夜以继日 yèyǐjìrì night and day (idiom)
night and day (idiom); continuous strenuous effort
How to remember 夜以继日: 夜 night + 以 to use + 继 continue + 日 sun = night and day (idiom).
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How it is used
- Idiom: day and night without stopping - 夜以继日地工作 (yèyǐjìrì de gōngzuò) work round the clock.
- Lit. 'take night to continue the day'; praises tireless, continuous effort. Written.