To study diligently and assiduously; to painstakingly refine one's skills or knowledge; to devote oneself to arduous study.
他为了完成这部巨著，多年来一直磨砥刻厉，潜心写作。
To complete this magnum opus, he has been studying diligently and writing assiduously for many years.
Era:
Ancient
Frequency:
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