be on guard

警惕  detail>>

be on guard with

警戒  detail>>

guard

 n.  1.警卫；警戒；看守。 2.防卫者；看守者；哨兵，卫兵，〔集合词〕警卫队；〔the G-〕 (英国等的)皇家禁卫军；【航海】护航舰。 3.防...  detail>>

no guard

无防备  detail>>

on guard

基本姿势 警惕,防范 在岗, 警惕 站岗,值班 站岗，警戒 值班，警戒  detail>>

the guard

守护报  detail>>

（be）on guard

站岗  detail>>