Please don't laugh at him.

请不要嘲笑他。

youdao

They always laugh at him.

他们总是嘲笑他。

youdao

Don't laugh at him.

不要嘲笑他。

youdao

He says he will laugh at any politician, journalist or other person who condemns him for those operations or calls him a terrorist.

VOA: standard.2010.04.01

Don't laugh at him.

别嘲笑他。

Don't 课堂 - SpeakingMax英语口语达人

You can look at your sister and say, "Don't laugh at him."

你可以看着你的妹妹说，“Don't laugh at him.”

Don't 课堂 - SpeakingMax英语口语达人

After some discussion it comes out that he is afraid people will laugh at him.

FORBES: 'My Son Is Gay' Is A Lesson In Bad Mommy Blogging

' The people around him and the audience viewing at home never laugh at him, but with him, because he's always in on the joke.

WSJ: Little People Wait for 'Mirror Mirror' and 'Snow White and the Huntsman'

His strong presentational style and his ability to laugh at his own mistakes helped endure him to the British public.

BBC: Harry Carpenter