Don't be crude tonight, Bernard, it doesn't become you.是什么意思？

Don't be crude tonight, Bernard, it doesn't become you.

今晚别说荤话，伯纳德，说荤话可不好。

be

v. 是，有，存在，做，成为，发生；aux. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质；

例句
The older child should be able to prepare a simple meal...
那个年纪稍大的孩子应当会做一顿简单的饭菜。

crude

adj. 粗糙的，粗杂的，粗鲁的，天然的，未加工的，简陋的；n. 原[生]材料，天然物质，原油；

例句
Don't be crude tonight, Bernard, it doesn't become you.
今晚别说荤话，伯纳德，说荤话可不好。

tonight

n. 今晚，今夜；adv. 在今晚；

例句
He will announce tonight that he is resigning from office...
他将于今晚宣布辞职。

Bernard

n. 伯纳德（男子名）；

例句
She knew many theatrical personalities and had worked, among others, with George Bernard Shaw.
她认识许多戏剧界人物，并与乔治·萧伯纳等很多人共过事。

it

pron. 它，他，正好是所需的，事实[情况]；n. <美俚>傻瓜，笨蛋，<俚>绝妙的人，理想的东西，登峰造极；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

become

vi. 变为，成为，变得，变成；vt. 适合，适宜，相称，相当，变成，发生；

例句
...abandoned buildings that become a breeding ground for crime.
沦为了犯罪温床的弃置楼群

you

pron. 你，你们，您们，各位，大家；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。