这段对话中的catch是什么意思?
问题描述：
这段对话中的catch是什么意思?
Tim:You need to tighten your belt Alice.Well,I'm fairly flush this month,want me to lend you some cash?
Alice:Tim,would you?
Tim:Sure,you know me,always willing to help a damsel in distress.There's only one small catch.
答
蹊跷,为难人的事情