smell a rat

smell a rat 感到不妙
例子：
It's very unlike Harry to be so friendly and I smell a rat-I wonder what he wants?
哈里不可能会这般友好,我觉得事情有些蹊跷——我不知道他想干什么?
A rat squeaks.
耗子“唧唧”叫.
Never rat on a friend.
决不要出卖朋友.
Rat desert a falling house.
屋塌鼠搬家.