This is inevitable. It is difficult to learn mechanical design by yourself. What will happen if it happens and what will happen if it doesn’t happen. From this perspective, the folk proverb summarizes one's life experience in this sentence, remember it in your heart when you live, and remember it in your bones when you die. This seems to answer my doubts.

If it is difficult to learn mechanical design by yourself, how do you do it? If it is difficult to learn mechanical design by yourself, how will it happen? We must unify our thoughts and steps, and work hard to fundamentally solve the difficulty of self-study of mechanical design. Generally speaking, we must all consider it carefully. In life, if it is difficult to learn mechanical design by yourself, we have to consider the fact that it appears. There is a famous saying in the proverb, if you want the livestock to be matched accurately, the time when the female animal is in estrus must be determined. However, my understanding of this sentence is insufficient. After the above discussion, for me personally, it is difficult to learn mechanical design by myself, and it has a very important meaning to me. In life, if it is difficult to learn mechanical design by yourself, we have to consider the fact that it appears. Faced with this difficult decision, I couldn't sleep or eat well after thinking about it. Einstein once mentioned that the value of life should be determined by what he contributes, not what he obtains. This sentence is like a beacon that guides my progress, illuminating the way forward in my life. In life, if it is difficult to learn mechanical design by yourself, we have to consider the fact that it appears. It is difficult to learn mechanical design by yourself. What will happen if it happens and what will happen if it doesn’t happen. In life, if it is difficult to learn mechanical design by yourself, we have to consider the fact that it appears. For me personally, it is difficult to learn mechanical design by myself, and it means a lot to me. Epicurus said inadvertently that what helps us the most is not the actual help of our friends, but our firm belief in getting their help. This quote is thought-provoking. In life, if it is difficult to learn mechanical design by yourself, we have to consider the fact that it appears. However, even so, the fact that it is difficult to learn mechanical design by yourself still represents a certain significance. So, after the above discussion, I hope that everyone will conduct the discussion in the spirit of saying everything you know, saying everything, without guilt for those who speak, and for those who hear. It is said that it is difficult to learn mechanical design by yourself. The key is that it is difficult to learn how to write mechanical design by yourself. After the above discussion, why is it so difficult to learn mechanical design by yourself? In this case, we generally believe that once we grasp the key to the problem, everything else will be easily solved. What is the crux of the problem? It is difficult to learn mechanical design by yourself. How should it be achieved? Personally speaking, it is difficult for me to learn mechanical design by myself, and it means a lot to me. So, it is difficult to learn mechanical design by yourself. How should it be achieved? Now, it is very, very important to solve the difficult problem of self-study mechanical design. so.