我记得我们在课堂上复习过一个图表。
在课堂上，ꃥ我们要做一个关于光对植物作用的实验。
In class, we are doing an experiment on the effect of light on plants.
老师在课堂上唱了一首滑稽的歌，令我们非常愉快。
To our great amusement, the teacher sang a funny song in class.
老师在课堂上唱了一首滑稽的歌，令我们非常愉快。
To our great amusement, the teacher sang a funny song during class.
他在课堂上对我们的点评像杀手一样的职业而准确。
The comment he gave us just as correct as a professional killer.
在课堂上，我们也将花一些时间写作，并以小组为单位进行编辑。
We will also spend some time writing in class, and editing as a group.
在课堂上我们经常讨论一些有趣的难题。
还有一个例子：一天在课堂上我们谈论“去新疆旅行”的话题。
Another example, one day in my class we talked about the topic "Travel to Xinjiang".
在课堂上，我们做一些实验。
在和进学没有关系的课堂上，我们会一直在教室里学习。
And no relationship in the classroom into the school, we will have to learn in the classroom.
在和进学没有关系的课堂上，我们会一直在教室里学习。
And no relationship in the classroom into the school, we will have to learn in the classroom.
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