We do not fully understand how the brain is organized.
我们不完全了解大脑是怎样构成的。
Even if you highlight important points or take notes in a class, you probably do not fully understand what you learned.
即使你在课堂上用彩色笔标出中重点或记笔记,你都不一定能完全理解你学到的东西。
Avoid expressions in foreign language that you do not fully understand.
一定要避免使用外语中你不熟悉的字词。
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