When you laugh, you make a sound with your throat while smiling and show that you are happy or amused. People also sometimes laugh when they feel nervous or are being unfriendly. 笑
If people laugh at someone or something, they mock them or make jokes about them. 嘲笑I thought they were laughing at me because I was ugly. 我想他们在嘲笑我长得丑。
noun [具体名词]笑,笑声;令人开心的时刻;引人发笑的人或事,笑料
Lysenko gave a deep rumbling laugh at his own joke. 李森科对自己讲的笑话报以朗声大笑。