姐夫的英文：
brother in law

(informal) older sister's husband

参考例句：

Hey, what about Brother-in-law?
哎，姐夫呢?

My brother-in-law is a real muttonhead.
我的姐夫真是一个笨蛋。

The programme manager has lost her brother in law in the earthquake.
项目经理在地震中失去了她的姐夫。

Brother-in-law still hasn't come , I'll go downstairs and have a look.
姐夫还没来，我下楼去看看他吧。

Here lived his brother-in-law. The grocery was below
他姐夫住楼上，杂货店在楼下。

My brother-in-law is just a pansy because he is a mother's boy.
〞我的姐夫娘娘腔,因为他是饱受母亲溺爱的娇生儿。〞

Carrie, however, was not to be reduced to the common level of observation which prevailed in the flat.
对工作的看法和将来的前途，嘉莉当然不会把她的想法降格到她姐姐、姐夫那些凡夫俗子的见解。

brother是什么意思：
n. 兄弟；教友；同事；战友；同胞
int. 我的老兄

He has scrap with his brother.
他与他的哥哥打架。

My brother is a football maniac.
我哥哥是个足球迷。

My brother and she are engaged.
我兄弟和她订婚了。

law是什么意思：
n. 法律；法规；法学；定律

the spirit of the law.
法律的实质

It is a law of creation.
这是一条宇宙万物的法则。

juggle with the law
歪曲法律

informal是什么意思：
adj. 非正式的；口语体的，通俗的；不拘礼节的

Informed judgement.
有事实根据的判断。

This is an informal expression.
这是一种非正式表达法。

This is an informal word.
这是一种口语用语。