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夜以继日

yè yǐ jì rì phrase C2

Traditional: 夜以繼日

  1. night and day (idiom); continuous strenuous effort
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他们夜以继日地工作,从中收集了许多关于植物治病的记录。
屠呦呦与青蒿素的发现, p. 1 · B2

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