查词历史：: on one's guard on one's feet on one's behalf on loan on height

on one's guard

生词本

简明释义

adv. 警惕

英英释义

词霸2012 v1.2版丰富词典内容优化真人发音

Adjective

1. vigilant;

"on guard against con artists"
"must remain on your guard in such a situation"

synonym： on guard，on one's guard(p)，upon one's guard(p)，on your guard