Definition
这是一个成语，字面意思是‘一旦离开就不再回来’，比喻事物已经过去，永远无法挽回，多用于形容时光流逝、机会错失或历史事件的不可逆转。在句中常作谓语或定语，语气带有感叹或无奈。
v.p.
to be gone foreverto be irrevocably pastnever to return
Examples
- 一去不返，。Qīngchūn yī qù bú, wǒmen yào zhēnxī xiànzài de shíguāng.Youth is gone forever; we must cherish the present time.
- ，一去不返，。Jīhuì yídàn cuòguò, yī qù bú, bié yóuyù le.Once the opportunity slips away, it never comes back — don't hesitate.
- 一去不返，。Nà duàn lìshǐ yǐjīng yī qù bú, dàn jiàoxùn bù néng wàngjì.That period of history is already gone forever, but its lesson must not be forgotten.
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