Definition
一日 is a formal/literary time word meaning 'one day', 'the same day', or 'someday'. It is the more refined equivalent of 一天 and appears in written Chinese, idioms, and set expressions like 一日三餐 and 一日游. Unlike 一天, 一日 often carries a sense of immediacy or a specific day in formal contexts.
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one day (formal/literary)the same day
Examples
- 一日。Tā yī rì zhī nèi wánchéng le suǒyǒu gōngzuò.He finished all the work within one day.
- ，一日。Tā bàomíng hòu, yī rì zhī nèi jiù shōudào le tōngzhī.After he registered, he received the notification on the same day.
- 一日。Wǒmen cānjiā le yí gè shìqū yī rì yóu.We joined a city one-day tour.
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