| 词汇 | on guard |
| 释义 | 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。 |
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