What’s the catch? 有什么陷阱?有什么条件?
(catch 名词可以表示设计好的困难)
e.g. I heard that company is offering free trips to Hawaii for their employees. What's the catch? 我听说这家公司为员工提供免费去夏威夷的旅行。有什么陷阱吗?
e.g. This car seems to be in great condition and it's priced really low. What's the catch? 这辆车看起来状态很好,而且价格非常低。有什么陷阱吗?