on guard

汉语翻译

在岗, 警惕

英语解释

形容词 on guard:

vigilant同义词：on one's guard, upon one's guard, on your guard

例句

The citizens were warned to be on guard against a sudden night attack.市民们得到通知，要提防夜间的突然袭击。Be on guard when somebody flatters you.有人奉承你时，一定要当心。There are soldiers on guard at the gate.大门口有士兵在守卫。While danger threatens we must all be on guard.危险正逼近，我们必须保持警惕。