on guard 详细解释

on guard

值班, 警戒

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。

词义辨析

同义参见:

circumspect  cautious  

反义参见:

off guard  

英英释义

形容词 on guard:

vigilant

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

补充

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。

例句

1. Police were on guard at Barnet Town Hall.警察在巴尼特市政大厅站岗执勤。 2. He is constantly on guard against any criticism.他时刻提防着任何批评。 3. Everyone should now be on their guard against terrorist attacks.每个人现在都要提防恐怖袭击。

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