用功
word C2- diligent
- industrious (in one's studies)
- to study hard
- to make great effort
From the library
钱先生又说：他知道不能转时，也很安心的用功了，笔记做得很详细的。
长妈妈曾经讲给我一个故事听：先前，有一个读书人住在古庙里用功，晚间，在院子里纳凉的时候，突然听到有人在叫他。
可惜我那时太不用功，有时也很任性。
Learn 用功 in real texts
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