a rat race 激烈的竞争
In the rat race of today's world, only the fittest survives.
在当今竞争激烈的世界里，惟有适者才能生存。
a pack rat 什么东西都不肯扔的人
My grandma is really a pack rat.
我奶奶是一个什么都不舍得扔的人。
look like a drowned rat 湿得像落汤鸡，狼狈不堪
I had to cycle home in the rain and came in looking like a drowned rat.
我只能冒雨骑车回家，进门时湿得像一只落汤鸡。
smell a rat 感到不妙，感到可疑
She smelt a rat when she got home and found the door open.
她回家发现门开着，觉得情况不妙。
be as quiet as a mouse 非常安静，不声不响
She was as quiet as a mouse that nobody noticed her presence.
她不声不响，以至于没人意识到她也在场。
