安全服务人员显然被弄得措手不及。

The security services were clearly caught napping.

《柯林斯英汉双解大词典》

这一举动为的是让对手措手不及。

It was an attempt to wrong-foot the opposition.

《牛津词典》

律师看似不经意的问题是为了使证人措手不及。

The lawyer's apparently innocent question was designed to catch the witness off (his) guard.

《牛津词典》

Now not only does Phoebus Apollo make a sudden appearance, but he seems actually to interrupt the speaker of the poem in order to correct him.

不仅是他的登场让人措手不及，他似乎也打断了诗歌创作者的叙述,以此来对他进行纠正。

耶鲁公开课 - 弥尔顿课程节选

They can't imagine -they don't have the power of imagination to think what the next crisis will be like, so it catches them by surprise.

他们无法想象,他们根本想象不出,下次危机爆发是什么样,所以危机发生时他们措手不及

耶鲁公开课 - 金融市场课程节选

Well, the reason for thinking otherwise, the reason for not being utterly dismissive of this suggestion, is that when people get ill, terminally ill, it often seems to take them by surprise.

其他的想法产生的原因，人们没有完全摒弃这个假设的原因，是当人们得病，病入膏肓时，这通常让人措手不及。

耶鲁公开课 - 死亡课程节选