他在课堂上用笔记本记下了所有重要的知识点。

He wrote down all the key points in his notebook during the lecture.

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He wrote down all the key points in his notebook during the lecture.

notebook 是由 note(笔记)和 book(本子)组成的复合词,字面意思是"记笔记的本子",即"笔记本"。

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