第一，你应该注意老师在课堂上教的东西，回去后复习。

First of all you should focus on what dose teacher teach everybody. After class you should review it.

youdao

在课堂上，你应当做一些笔记。

In class you should make some notes.

youdao

我在课堂上画飞机来消磨时间。一天，一名年轻人从我肩膀上看了看，他说，“你画的真不错”。

One day a young man looked over my shoulder, he said, "You draw very well."

youdao

我在课堂上画飞机来消磨时间。一天，一名年轻人从我肩膀上看了看，他说，“你画的真不错”。

One day a young man looked over my shoulder, he said, "You draw very well."

youdao