on guard
值班, 警戒
例句与用法:
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。
提防
Be on guard against those who are jealous of your success.
要提防那些嫉妒你的成功的人。
on guard
词义辨析:
同义参见:
circumspect
cautious
反义参见:
off guard
on guardon guard1.■站岗Two soldiers must be on guard all night.必须有两个士兵撤夜站岗。2.■警惕I should certainly be on my guard if I were you.我要是你肯定会保持警惕。3.■防备…Be on your guard against thieves.当心小偷。You must be on your guard against the dog.你一定要防备那只狗。We shall have to be on our guard against making mistakes like that in the future.我们今后必须防止发生类似错误。
on guard1.■警惕,提防2.■【军事】站岗,放哨,值班
见:guard: on guard