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1·He had a way of throwing Helen off guard with his charm when she least expected it.

他有办法用他的魅力让海伦在最意想不到的时候失去戒备。《柯林斯英汉双解大词典》

2·The findings caught Carli off guard.

这些发现让卡利措手不及。

3·A pickpocket needs targets who are relaxed and off guard.

扒手需要放松警惕的目标。

4·The pastoral elegance of this little simile really catches us off guard.

这个有着田园诗情画意般优雅的小比喻确实让我们毫无防备。

5·This catches me a little off guard.

这番话让我有点猝不及防。

6·Her betrayal took me completely off guard.

她的背叛让我完全措手不及。

7·The pace of this change has certainly caught hotels off guard.

社会媒体的变化速度让酒店措手不及。

8·Still, there have been occasions when I've been caught off guard.

但是，有时候当我被海关警察抓牢的时候我还是会觉得很囧。

9·The pace of this change has certainly caught many hotels off guard.

这种变化的速度让酒店措手不及。

10·I caught him off guard when I ran into him and we both fell to the ground.

趁他措手不及，我冲向他，我两都倒在地上。