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on guard什么意思、怎么读?单词发音音标、相关例句、释义:在岗, 警惕

on guard 音标:[ɔn ɡɑ:d ]
在岗, 警惕

The rancher must always be on guard against the dangers that nature can create.

牧场主必须时刻防备可能发生的自然灾害。

Two soldiers must be on guard all night.

必须有两个士兵撤夜站岗。


※He is most free from danger, who even when safe,is on guard. 居安思危者最平安.

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