阅读下面的短文，将划线部分的句子译成英文或中文。

     Food is very important. Everyone needs to eat well if he or she wants to have a strong body. 1.Our

minds also need a kind of food. This kind of food is knowledge. We begin to get knowledge even we are

very young. 2.孩子们对他们周围的一切都感兴趣. They learn something when they are watching and

listening. When they are getting older, they begin to read storybooks, science books and anything they like.

3.When they find something new, they love to ask questions and try to find out the answers. 

     4.获取知识的最佳方法是什么呢? If we learn by ourselves, we will get the most knowledge. If we

are always getting answers from others and do not ask why, we will never learn well. 5.If we study in the

right way, we will learn more and understand better.

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井下运行的电动机过热的主要原因有哪些？