On guard 站岗

2023-04-07 18:00:03  每日学英语
on guard 站岗;值班;警惕;提防;看守;当班

【例句】
Two soldiers must be on guard all night.
必须有两个士兵整夜站岗。

We must be on guard not to let the enemy spies worm(themselves) in.
我们必须特别警惕,不让敌人的特务钻进来。
 

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