on one's guard

美 　英

• na.警戒
• 網(wǎng)絡(luò)警惕；提防；警戒著

英漢解釋

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 !

可是我想還是不去向布爾斯德羅德小姐抱怨。跟這個女人打交道，可要當(dāng)心點(diǎn)。