on one's guard

on one's guard

美 　英

• na.警戒
• 网络警惕；提防；警戒着

英汉解释

na.

1. 警戒,提防

例句

I think it better, however, not to complain to Miss Bulstrode. One has to be on one 's guard when dealing with that one !

可是我想还是不去向布尔斯德罗德小姐抱怨。跟这个女人打交道，可要当心点。