When he laughed at her, she fired up at once.

当他嘲笑她时，她立即发火了。

youdao

He laughed coarsely at her.

他粗鲁无礼地嘲笑她。

《牛津词典》

I thought it was a great idea until, at the same party, I came upon a guest who actually is a brain surgeon and he laughed when I told him her plan.

我一直认为这是个不错的想法，直到一次也是在家庭聚会上遇到一名真正的脑外科医生。

youdao

Ms Onwurah said Dr King's words were a revelation, that "people would have laughed at the idea of a black woman becoming an MP", but he made that possibility very real by visiting her home town.

BBC: Tyne & Wear