off his guard
off his guard-
The lawyer 's seemingly innocent question caught the witness off his guard .
那个律师提出的似乎无关痛痒的问题，把证人问得措手不及。
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The sergeant made some kind of report , and some entry in a book , and then the convict whom I call the other convict was drafted off with his guard , to go on board first .
巡官做了汇报，又在本子上做了些记录，然后便让卫兵押着我不认识的那一个犯人先上监狱船去。