laugh on,laugh at ,laugh of,laugh for的用法与区别

laugh..on 笑,笑声例如:You're a sport to laugh at the trick we played on you.你真是条好汉,对我们给你摆的圈套一笑了之.laugh at 嘲笑,漠视,因...发笑例如:They laugh at him.他们讥笑他.laugh off 用笑摆脱例如...