to catch out
[phrase form: catch]
01
使措手不及, 设陷阱
to put someone in a difficult position
例子
The surprise quiz caught the students out, as they were n't prepared for such a difficult set of questions.
突袭测验难倒了学生们，因为他们没有准备好面对这么难的一套问题。
02
当场抓住, 揭穿
to find evidence that shows someone is being dishonest
例子
She catches out her brother sneaking into the house after curfew.
她在宵禁后逮到她弟弟偷偷溜进房子。
