措手不及的;没有提防的;无思想准备的 If someone is caught off-guard, they are not expecting asurprise or danger that suddenly occurs.
The question caught her completely off-guard.这个问题令她猝不及防。
The absent-minded boy is always losing his books. I am all at sea in the adolescent stage of mylife. 这个心不在焉的男孩老是丢书。刚刚成长起来的我陷入了迷茫之中。
冷不防的;大出意料的;极为慌乱的 If someone is caught off-balance, they are extremelysurprised or upset by a particular event or piece of news they are not expecting.
Mullins knocked me off-balance with his abrupt change of subject…马林斯突然改变话题，这让我措手不及。
4.in the dark
I’m as much in the dark as you. 我和你一样毫不知情。
(情感、事件等)使不知所措，使难以承受 If you are overwhelmed by a feeling or event, it affectsyou very strongly, and you do not know how to deal with it.
I was overwhelmed by the sheer quantity of information available.仅已有的信息量就大得令我不知所措。