Our study can be divided into two parts: one is in class and the other is out of class. Both of them are important to students. They depend on each other.

We must attach importance to after-class What we have learnt in class is very limited, because only knowledge in textbooks can be acquired. However, we can learn more out of class. A most important thing is that knowledge comes from practice. In the after-class study we can apply out knowledge to practice.Just like after-class study, study in class is also very important. It occupies most of our time. We must pay much attention to it. In-class study and after-class study are closely connected with each other and improve each other.

If that's the case, why don't we combine them and study effectively?

我们的学习可以分为两个部分：一是在课堂上学习和一个是课外学习。它们都是很重要、彼此依赖的。

我们必须重视课外学习，我们在课堂上学到的东西是非常有限的，因为只有在教科书可以获得知识。然而，我们课外可以学到更多，最重要的是知识来源于实践。在课后学习中我们可以把知识应用到实践。正如课外学习那样，课堂中学习也很重要，它占用了我们的大部分时间，我们必须重视它。在课堂学习和课外学习相辅相成、相互促进。

如果那样的话，为什么我们不把它们结合起来更有效率的学习呢？

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