on guard

英[ɒnɡɑːd] 美[ɑːnɡɑːrd]
  • 值班； 警戒

详细释义

Adjective:
  1. vigilant;

    "on guard against con artists"
    "must remain on your guard in such a situation"

双语例句

    1. He reported the murder to the police on duty.
      他将凶杀事件告知值班警察。
    2. There was no fireman on when the fire broke out.
      火灾发生时没有消防队员在值班。
    3. Keep a vigilant eye on the imperialist jackals.
      对帝国主义的走狗要保持警戒。
    4. Put none but Americans on guard tonight.
      今夜只让美国人担任警戒。

用法讲解

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