●a big fish大人物

In the city I was nothing,but in the country I was considered a big fish.在城里我并不是什么大人物，但是在乡下我被认为是个了不起的人物。

●a piece of cake小菜一碟

For him,the work is a piece of cake.对他来说，这点活儿就是小菜一碟。

●add insult to injury伤口上撒盐；落井下石；火上浇油；雪上加霜

My car barely started this morning,and to add insult to injury,I got a flat tire in the driveway.今天早上我的车差点没发动起来，雪上加霜的是开到车道时一个车胎也没气了。

●all ears洗耳恭听

If you have a good idea for improving my pronunciation,I’m all ears.如果你对改进我的发音有好的建议，我洗耳恭听。

●be down-to-earth脚踏实地

People should be down-to-earth,instead of being over-ambitious.做人应该脚踏实地，不要好高骛远。

●beat around the bush旁敲侧击；兜圈子；拐弯抹角

Don’t beat around the bush!Tell me exactly what Jack said.别拐弯抹角了！实话告诉我杰克说什么了。

●bed of roses称心如意的生活

Life is not a bed of roses,but please treasure it and enjoy it.虽然生活不总是一帆风顺，但是请珍惜生活，享受生活。

●best of both worlds两全其美

The house combines country surroundings with city convenience,so having the best of both worlds.这所房子既有乡村的环境又有城市的便利，两全其美。

●big time非常;很;大大地

And you owe me big time!这回你欠我很多了吧。

●boss around颐指气使

I heard that he loves to boss people around.我听说他很爱指使人。

●cat nap打瞌睡

I try to take a little cat nap every Sunday afternoon.我试着在每个周日的下午小睡一会儿。

●cool it冷静一点

Stop fighting,you boys!Now cool it!孩子们，不要打了！冷静些！

●go places(在社会上等)成功;有成就

Once I’m qualified in my profession,I intend to go places.一旦我有资格从事自己的职业，我就想获得成功。

●go the extra mile多付出代价;多努力一点

He’s always willing to go the extra mile for his friends.他总是愿意为朋友两肋插刀。

●have a cow非常生气

I thought he was going to have a cow when I told him I’d lost his key.我以为当我告诉他我丢了钥匙时，他会大发雷霆的。