The sentence "Learn math, physics and chemistry well, travel all over the world, I am not afraid" applied in the past and still applies today. Why do you say that? Because mathematics, physics, chemistry and other disciplines are the basis of learning natural science, it is impossible to carry out scientific research without learning mathematics and physics well. Without scientific research, there would be no Chang 'e in the sky and no dragon at sea. There will be no high-speed rail running and the bridge will cross the sea; There is no Beidou navigation and 5G network. Everything closely related to modern life is inseparable from modern science and technology, and from basic disciplines such as mathematics and physics. Therefore, if a person learns mathematics and physics well, it will be useful everywhere. This was the case in the past, now and in the future.

What is said here is that it is very important to learn mathematics and physics well, but it does not deny the importance of liberal arts. Liberal arts are equally important in today's society. Therefore, it is best not to be partial in learning, especially in primary and secondary schools, but to develop in an all-round way.

The saying that "learning mathematics, physics and chemistry well is not afraid to travel all over the country" cannot be said to be outdated, and its horse is not accurate enough. The meaning of this sentence is: learn the benefits of mathematics and physics, learn the role of mathematics and physics, indeed, in that era,

Learn math and physics well, you will occupy the highest point of the college entrance examination, and you will win the college entrance examination. The success of the college entrance examination is the first victory in life, which lays the foundation for the future development of life, that is, with excellent life capital, there is a great demand for such talents in the whole country, and it is not a problem to find a job nationwide.

Now it seems that this statement is inappropriate and not comprehensive enough. More importantly, we should not only study math and physics, but also learn our own language, the traditional literature left by our ancestors, and we in China. With the reform of education in China, especially the reform of college entrance examination system, national education pays more attention to the cultivation of comprehensive talents, not only in mathematics and physics, but also in other courses. The country pays more and more attention to the level of Chinese, and the weight of Chinese class is getting heavier and heavier. They say that if you learn Chinese well, you will win the college entrance examination. No matter how the education is reformed, students are required to develop in an all-round way, and cannot go from one extreme to the other, so as to cultivate all-round talents in line with China's national conditions. In the new era, they are not afraid to travel all over the country, but are afraid to travel all over the world.