1. 词汇：big cheese

释义：Someone who has an important and powerful position in an organization. （大人物）

例句：Maire is undoubtedly the big cheese of the Jura wine producers.

Maire无疑是汝拉葡萄酒生产商的重要人物。

Several big cheeses from the State Department attended the conference.

国务院的几位重要官员出席了会议。

Here’s a note from the big cheese telling me to come in for a chat.

这是一位大人物给我的一张便条，让我进来跟他谈一谈。

Jacob thinks he's a big cheese now that he's been promoted to assistant manager.

雅各布被提升为经理助理，他觉得自己是个大人物。

2. 词汇：clam up

释义：To keep or become silent or withhold information. （据不开口，隐瞒信息，保持沉默）

例句：You can't talk with those peasants. They can clam up as well as the Foreign Office.

你不能跟那些农民谈话。他们象外交部一样，可能一点口气也不漏。

You should not clam up on him.

你不应该拒绝跟他谈话。

He always clam up when we ask him about his family.

我们一问到他的家庭时, 他总是闭口不言。

Will you clam up? The boss is talking.

请你保持安静? 老板在说话。

3. 词汇：couch potato

释义：A lazy person whose recreation consists chiefly of watching television and videos. （电视迷）

例句：The elder son is a bookworm while the younger one is a couch potato.

大儿子是个书虫，而小儿子则是个电视迷。

He is such a couch potato on weekends and doesn’t do his homework.

他一到周末就成天看电视看个不停，不写作业。

My father is a couch potato. My mother is always angry with him but he doesn't care.

我爸爸是个电视迷。我妈妈总是生他的气，但他不在乎。

Sometimes, after a really hard week at school, I collapse and want to be a couch potato at home.

有时候，一个星期在学校念书实在很累了，回家想不停看电视。