She gave a short, derisive laugh.

　　她譏諷地笑了笑。

　　She always makes me laugh.

　　她總是讓我發笑。

　　She gave a strained laugh.

　　她勉強笑了一下。

　　I tried hard not to laugh.

　　我強忍住不笑出來。

　　There was a short, derisive laugh.

　　響起一陣短促的嘲笑聲。