on guard against

on guard against guard against guard against 用in a way,pass on,guard against造句． no one goes on guard against a gag guard sb against造句 guard against是什么意思 guard against是什么意思 guard against是什么意思 guard against damp什么意思 guard against 和 against的区别 翻译the citizens were warned to be on guard against a sudden night attack 有没有on guard TCAV ON GUARD you should certainly be on your guard against thieves.be on your guard本身就是戒备防备的意思,为什么还要用agains他也是,防备;预防的意思 always be on 跟be always on的区别?1-We should always be on our guard against complacency.2-The workers in the factory are always on theri guard against accidents.疑问：为什么第一句的Be动词位置跟第二句不同啊?always be on 跟be 21.All the students in my class the lecture given by Dr.Wang yesterday.A.appreciated B.approached C.pronounced D.interrupted22 The army and the people on the island were the attacks from enemies.A.on guard against B.in guard to C.on guard to D.in gua guard against theft and trace information中文意思是什么?