①The yen is the unit of currency used in Japan.【n.日元（日本货币单位）】
②If you have a yen to do something, you have a strong desire to do it.【n. 渴望;强烈的欲望;热望】
①She's got a part-time job for which she earns 2,000 yen a month.
②Mike had a yen to try cycling.
He's a natural with any kind of engine but he has an unfortunate yen for speed.
在表示“ 渴望;强烈的欲望”时，它最常见的搭配是“have a yen to do sth”或者“have a yen for sth”
另外，在电影《傲慢与偏见》中出现的一个短语“hanker for sth”也可以表示“渴望; 热切希望”
I hanker for a simpler world. Is that a crime?
这两个表达都可以用在写作中，表示“想要做某事”，用来替代“want to do sth”
[scode type="blue"]below the belt
a comment that is below the belt is cruel and unfair.
①That remark about his weight was a bit below the belt.
②Do you think it's a bit below the belt what they're doing?
①tighten one's belt 勒紧裤腰带；紧缩开支；节衣缩食
【If you have to tighten your belt, you have to spend less money and manage without things because you have less money than you used to have.】
Clearly, if you are spending more than your income, you'll need to tighten your belt.
②have sth under your belt 已经取得（或完成）
【If you have something under your belt, you have already achieved it or done it.】
Clare is now a full-time author with six books, including four novels, under her belt.