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

律师看似不经意的问题是为了使证人措手不及。

Something related to your salary or your income or your job might catch you off guard, or surprise you in some way.

你的薪水，收入或工作可能会给你带来惊喜。

Caught off-guard, Pope slides out of the Taj Mahal room, careful that his wife doesn't catch a glimpse of her anniversary present-to-be.

Pope没有料到她会来，他从制作泰姬陵模型的小间里快步走出，他不想让老婆在结婚纪念日前就看到这个礼物。

The other behavior that might catch you off guard is the behavior of deletes.

另外一个您可能失察的地方是 delete 的行为。

Clearly they want to catch me off guard.

很明显，他们想攻我个措手不及！