参考词典中on guard的常规释义:
基本释义
- 值班,站岗;提防,警惕
参考例句
- He's on guard against trouble.
他很小心怕惹上麻烦。 - Be on guard against those who are jealous of your success.
要提防那些嫉妒你的成功的人。
- He's on guard against trouble.
英英解释
1个形容词解释
- vigilant
[同] on guard, on one's guard, on your guard, upon one's guard
[例]- on guard against con artists
- must remain on your guard in such a situation
点击查看……- vigilant