1. There should be more good words and sentences about a brief history of time.

Introduce a brief history of time. Good words and sentences. 7. When Einstein said When "God does not play dice", he is wrong. In view of the hints that black holes give us, God not only plays dice, but also often throws dice into places where we can't see to confuse us. 6. I noticed that even those who claim that everything We are all predestined and we cannot make any changes. We will be the same cautious when crossing the road. 5. My goal is very simple, which is to complete my understanding of the universe, including why the universe is what it is. What it looks like, and why the universe exists. 4. Someone told me that every time a scientific formula appears in my book, sales will drop by half. When I again put Einstein’s famous formula E at the end of the book =MC2, I hope not to scare away half of my potential readers. 3. When I was twenty-one, my expectations for happiness dropped to zero. From then on, any small happiness It all makes me feel extremely happy. 2. A boring life is a tragedy. 1. The eternity towards the end seems to be endless. 2. What are the famous quotes by Hawking in "A Brief History of Time"

1. The light we see from distant galaxies was emitted millions of years ago. In the case of the most distant objects, the light was emitted 8 billion years ago. So when we look at the universe, we are looking at its past. ——Hawking "A Brief History of Time"

2. Why do we never see the broken cups gathering together, leaving the ground and jumping back to the table? The usual explanation is that this violates the second law of thermodynamics. The degree of disorder or entropy in any closed system always increases with time. In other words, it's a form of Murphy's Law: Things tend to get worse: a full cup on the table is a highly ordered state, while a broken cup on the floor is a disordered state. One could easily go from a cup on the table earlier to a broken cup on the ground later, rather than the other way around. ——Hawking "A Brief History of Time"

3. Now we know that any particle has an antiparticle that will annihilate it. (For a force-carrying particle, the antiparticle is itself.) There could also be entire anti-worlds and anti-people made of antiparticles. However, if you encounter someone who is against you, be careful not to shake hands! Otherwise, both of you will disappear in a giant flash of light. ——Hawking, "A Brief History of Time"

4. Before the 20th century, no one had ever suggested that the universe was expanding or contracting. This interestingly reflects the thinking atmosphere at that time. It is generally believed that the universe has either existed in an unchanging state for an infinite amount of time, or that it was created in the finite past in a state more or less as we see it today. This may be partly due to people's tendency to believe in eternal truths, and also to the comforting notion that the universe must be immortal and unchanging, even though we are subject to birth, aging, illness and death. ——Hawking "A Brief History of Time"

5. On the other hand, philosophers who take it as their duty to find out the roots cannot keep up with the progress of scientific theories. In the 18th century, philosophers considered the entirety of human knowledge, including science, as their domain and discussed questions such as whether the universe had a beginning. However, during the 19th and 20th centuries, science became too technical and mathematical for philosophers, or anyone but a few experts. Philosophers have narrowed the scope of their questioning so much that even Wittgenstein, the most famous philosopher of this century, said: "The only remaining task of philosophy is the analysis of language." This is from Aristotle What a degeneration of the great tradition of philosophy since Kant! ——Hawking "A Brief History of Time"

6. The matter in the universe is composed of positive energy. ——Hawking "A Brief History of Time"

7. All structures in the universe originate from the smallest fluctuations allowed by the uncertainty principle of quantum mechanics. ——Hawking, "A Brief History of Time"

8. Common sense tells us that without external intervention, things will always tend to increase their disorder. ——Hawking "A Brief History of Time"

9. In the infinite universe, there are countless "worlds" being created and destroyed, but the infinite universe itself exists forever. Life is not only on the earth but also on the earth. There are them on the planet, and there may also be them on those distant planets that are invisible.

——Hawking, "A Brief History of Time"

10. God hates naked singularities! ——Hawking, "A Brief History of Time"

11. A good theory must meet the following two requirements: First, the theory must be able to accurately describe a large number of observations - these observations are based on only a few arbitrary Secondly, this theory can make clear predictions about the results of future observations. ——Hawking "A Brief History of Time"

12. Which came first, the chicken or the egg? ——Hawking "A Brief History of Time"

13. In an unchanging universe, the endpoint of time is something that must be given by existence outside the universe; the beginning of the universe has no physical Inevitability. ——Hawking, "A Brief History of Time"

14. Humanity's deepest desire to seek knowledge is enough to provide justification for the continuous exploration we engage in. ——Hawking, "A Brief History of Time"

15. When most people firmly believe in an essentially static universe, the question of whether it had a beginning is really a metaphysical or theological question. ——Hawking's "A Brief History of Time" 3. Urgent

Introduce.

A brief history of time.

Good words and good sentences.

7. When Einstein said, "God does not play dice," he was wrong. Given the hints black holes give us, God not only throws the sieve, but often throws the dice into places we can't see to confuse us.

6. I noticed that even those who claim that everything is predestined and that we can't do anything to change it are still cautious when crossing the road.

5. My goal is very simple, which is to complete my understanding of the universe, including why the universe is the way it is and why the universe exists.

4. Someone told me that every time a scientific formula appears in my book, my sales will drop by half. When I once again include Einstein's famous formula E=MC2 at the end of the book, I hope that I won't scare away half of my potential readers.

3. When I was twenty-one years old, my expectation of happiness dropped to zero. From then on, any small happiness can make me feel extremely happy.

2. A boring life is a tragedy.

1. The eternity towards the end seems to be endless. 4. Hawking's famous sayings in "A Brief History of Time"

Let's not talk about theory. It is not a famous saying. Originally, Hawking's most famous black hole hypothesis was also proved wrong by another scientist. , so I won’t talk about the theoretical aspects.

1. When you face the possibility of dying young, you will realize that life is precious and you have a lot of things to do.

2. Regarding the controversy over space-time physics, I dare not bet with my colleagues because I am afraid that they are people from the future who came through the wormhole and they know the standard answer very clearly.

3. Prostitutes and scientists are the two best professions.

4. One more mathematical formula in a book will reduce the number of readers by half.

5. God creates both geniuses and fools. This does not depend on talent, but is completely the result of different levels of personal effort.

6. Physical and mental disabilities cannot occur at the same time.

7. No matter how bad the fate is, people should always do something. Where there is life, there is hope. 5. The good words and sentences of the book A Brief History of Time and what to eat after reading it

A young mountain man asked an old mountain man for advice: "How can I get out of this mountain?" The old mountain man asked Said: "Just go over the mountain."

So, the young mountain man was full of hope and ran towards the mountain happily. But when he reached the top of the mountain, he was extremely disappointed.

What he saw was still mountains. Moreover, looking into the distance, the mountains are endless and there is no end in sight.

So, he found the old mountain man and complained to him: "Why did you lie to me!" The old mountain man said calmly: "Maybe you have to climb countless mountains outside the mountain." Yes. , don’t expect to reach your destination by climbing over a mountain.

Only through many ups and downs can you achieve success. As the saying goes: Failure is the mother of success.

But who can know how many failures it takes to achieve one success? Just like Beethoven. He persisted in the music he loved despite his long adversity because it was what he believed in.

God did not give him a good family background, but gave him a father who did not love him, and made him live in a world without love. At the age of twenty-six, he became deaf in both ears. What a terrible thing for a musician! But the lonely life did not make him silent and shrink.

After that, he was as immersed in music as ever, and composed the immortal masterpiece "Ninth Symphony". He is so strong, even if he has to pay much more hardships than ordinary people, he will do it without hesitation.

I think this is a kind of persistence and perseverance. Beethoven completed more than 100 works throughout his life, which were enough to make him famous throughout the ages.

We all need to have such persistence. 6. "A Brief History of Time" Hawking's wonderful sentences or paragraphs

The improvement of reading ability does not happen overnight, but is achieved gradually. To improve reading level, we must pay attention to the following three aspects. 1. Selection of reading materials It is very important to choose language materials of appropriate level. Judging from the difficulty of the article, if the material to be read has too many new words, it is inevitable that students will have to constantly consult the dictionary. If the sentences are too complex and each sentence must be considered repeatedly, then students will quickly lose interest in reading. The material chosen should therefore be based on familiar vocabulary and grammatical structures. When encountering a small number of new words, you can guess their meaning. Guessing plays an important role in improving foreign language reading skills. From the perspective of the genre of the article, the materials to be read should be rich in content, broad in subject matter, diverse in genre, connected with social life, and close to the students' reality. In this way, students' cross-cultural awareness can be cultivated. Judging from the content of the article, the interest of the reading material must also be paid attention to. The reading content can arouse students' interest in reading. Once students develop an interest in reading, their reading ability will improve rapidly. 2. Cultivation of reading strategies Appropriate insertion of some special training before and after reading or even at the same time is of great benefit to improving reading effects and developing reading ability. These exercises are designed to help students use context to reveal word meanings, analyze the grammatical structure and part-of-speech forms of sentences, quickly grasp basic ideas, and learn to use a dictionary. Students must gradually learn to analyze word structure and contextual relationships to help understand word meanings. When reading short articles, you should also follow the principle of going from the whole to the details, and read the article in the steps of "full text, paragraphs, sentences, words". You can find the best answer by reading thoroughly, carefully and re-reading. Among the thorough reading, careful reading and re-reading, re-reading is particularly important and effective. Through re-reading, you can review and refine the answers and improve the accuracy of answering questions. Only by increasing the difficulty and overcoming the difficulties in reading can reading ability be improved. 3. The improvement of reading speed requires understanding first, and speed second. If you read fast, if you don't understand, you haven't read. If you can understand but the reading speed is too slow, the efficiency is too low, which means that the reading ability is insufficient. Therefore, an important task for students in reading is to improve their reading speed under the premise of understanding. Develop your own speed reading and skimming abilities. Speed ??reading is a kind of rapid reading to find the main idea of ??the article. Speed ??reading is usually done when there is no time to read carefully, or when deciding whether a passage is worth reading carefully. Speed ??reading is of great practical value in life. Skimming is also a kind of fast reading, but it is more purposeful and requires looking for very specific information such as time, place, numbers, etc. In fact, the requirements for new courses and review courses are completely different. Students who are about to enter the third year of junior high school must lay a solid foundation when facing new lectures and conduct basic knowledge training such as words, phrases, sentence patterns, and grammar. No sequelae will be brought to the review session. When facing review classes, students must learn to use the knowledge they have learned to solve problems and continuously improve their comprehensive language application ability. The final thing is to connect with the full text and answer the question on the premise of understanding the main purpose of the article. The following article is excerpted, I hope it will be helpful to you in Chinese reading. Chinese reading comprehension questions are a comprehensive question type, which can effectively test students' reading comprehension ability and Chinese quality. The problem settings are roughly divided into three levels: directly derived from the original text, indirectly derived from the original text, and beyond the original text.

For first-level questions, you need to carefully perceive the original text and think about it for a while, so that you can find answers directly from the original text or your own knowledge reserves; for second-level questions, you need to repeatedly strengthen and perceive the original text as a whole, and make sense of the text. To fully comprehend, and actively analyze, think deeply, and summarize at a high level; for third-level questions, you need to have a high degree of understanding of the meaning of the text, and on this basis, you need to actively perform extended thinking, divergent thinking, reverse thinking and other thinking activities to form an answer . However, the author found that some middle school students are often eager for success when doing questions. The process of doing questions is hasty and impetuous, the answers to questions are superficial and omitted, and they cannot complete reading comprehension questions with high quality and efficiency. So, how can we get rid of this problem and do well in reading comprehension questions? The author has the following experiences: 1. Read, and read thoroughly. The foundations of reading comprehension. To develop a deep and thorough understanding, repeated reading is necessary. The ancients said, "Read a book a hundred times, and its meaning will become apparent." This is the truth. The main point of view, central meaning, writing ideas, and writing clues of the article are all hidden in the article. Therefore, only by reading it repeatedly and strengthening your perception can you deeply understand and accurately grasp it. However, some students are eager for success, neglecting to read the original text, and only read it in general terms, without seeking a deeper understanding, and finish the matter hastily. As a result, they have a partial understanding of the original text and even form a wrong understanding. To understand on this basis, wouldn’t it be like “making a meal without rice”? Wouldn’t the conclusion reached become a “castle in the air”? Of course, familiarity does not mean mechanical repetition. When reading thoroughly, you should give a certain amount of time and space for thinking. 2. Think deeply. Only by thinking deeply can you discover. The so-called deep thought means that readers should stand at the author's level, organically combine their own cultural qualities and subjective consciousness, actively, efficiently and carefully think, and deeply explore the psychological process of the article's deep meaning. Any article will leave a certain amount of thinking space for readers. Therefore, we should not be lazy in thinking or skimp on the topic, but should think deeply and get to the point. Only in this way can the problem be solved easily, just like "a cook solving an ox". 3. Take and avoid taking words out of context. The article is the author's consciousness as a whole. Each part and each level is connected with flesh and blood and is integrated into one body. Therefore, how can we ignore the integrity of the article, how can we get a glimpse of it, see only the trees but not the forest, and take it out of context? The correct approach is to start from the article as a whole and focus on the high points of the article, from shallow to deep, layer by layer, and layer by layer. Only in this way can our understanding be biased and full of fallacies. 7. Who can help me understand this passage in "A Brief History of Time"

In a three-dimensional Cartesian coordinate system (Decartes system) A coordinate of represents the position of a point in space. This coordinate is, for example, (x1, y1, z1). Now, you can rotate, translate or even stretch this three-dimensional rectangular coordinate system arbitrarily, but the position of the point in the space just now remains unchanged; it will not move due to the movement of the coordinate system. What changes is only the indication. The coordinates of this point in the new coordinate system (x2, y2, z2).

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Believe the above content It's not difficult. If you still have difficulty, you can understand it this way: I used a meter ruler to measure the width of the table, and it was 1.5 meters; then I used an imperial ruler to measure it, and it was 1.5 meters. Feet (it will no longer be 1.5); then use the tiger's mouth to measure, it is 8 tiger's mouth. This is similar to coordinate transformation: the physical entity remains unchanged, the coordinate system (ruler) changes, and the coordinate values ??change.

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Then, in the narrow sense The theory of relativity holds that our world is four-dimensional, with three dimensions of space and one dimension of time. This constructs a four-dimensional coordinate system. Any event (such as you are reading this text) occurs at a point in the coordinate system. You have four coordinate values ??(such as latitude, longitude, altitude, AD . Year, month, day, hour, minute, and second). After rotating and translating this coordinate system as above, you will have a new coordinate system and four coordinate values ??describing the same time.

Maybe you can take these four values ??like this:

Straight-line distance from Beijing. .Miga polished. Distance covered in seconds

East of London. meters

from the center of the Milky Way. Light years

The time since the formation of the solar system.

Years plus the time it takes for light to reach the Earth from the constellation Cygnus

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Finally, it is worth mentioning that the rotational transformation just mentioned refers to high-speed motion in practical physical applications. For example, if an alien approaches the Earth at a very high speed relative to the Earth's revolution, he (it?) thinks that the distance between you and Beijing is different from the distance from Beijing to you; he thinks that the "now" distance is different. The time when the solar system was formed is also different from yours. But no matter what, the "physical fact" that you see these words will not change due to the choice of coordinates.

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The above analysis is truer There are still many loopholes. I have little talent and little knowledge, and it is difficult to explain them all in one sentence. I am just kidding. 8. Explanation of a passage in A Brief History of Time

It is a pleasure to meet someone who is also interested in macroscopic theories of the universe. My understanding is:

In the study of large-scale cosmology, there is no concept of an absolute center, just like absolute time and absolute space. The word "center" exists relative to "limited". Einstein once tried to reject the concept of "infinity" and even introduced the "cosmological constant" to try to eliminate the "uncertain factors" in the study of the dynamics of the universe, but in the end it proved to be useless. However, the premise of "infinity" does not affect our study of the dynamics of the universe, because we can study it in a limited space, that is, "consider the limited situation first" as mentioned in the article, and then expand the scope after drawing conclusions to provide the accuracy of the study. . The feasibility of this method can be proved by the "weak anthropic principle". A brief explanation is that the result of our observation of the universe is A because we observed it under the conditions of A and within the space-time range of A, so we conclude that A The result, and B is the extension of A in the space-time range (the observation time is longer and the observation range is larger), so B is more accurate than A. From A to B to Z and subsequent research, the closer to the objective facts, the more accurate the universe model can be derived.