Forced smile
笑───laugh;强───strong
He uttered a snorting laugh.───他扑哧一声笑了。
She gave a short, derisive laugh.───她讥讽地笑了笑。
She gave a strained laugh.───她勉强笑了一下。
by itself ( with a smile , almost an outright laugh ) : the truth of the matter is far more spectacular.───自言自语（带着微笑，差不多大笑）：事物的真相远更宏伟壮观。
Ralph , Jr. and his friends laugh. When the woman is half a block away, he sneezes again and her skirt blows over her head once more.───小拉尔夫和朋友们大笑起来。当那个女人走到小区的一半时，他又打了个喷嚏，她的裙子又飞到头上。
Right then, it was as if the laugh track in my mind was cued, except no one was there to watch.───就在那时，我的嘲笑细胞好像又复活了，只是这时可没人在一旁观看。
I resisted the impulse to laugh.
You never laugh at my jokes!
Laugh at your ills, And save doctors' bills.
With wry humour, they laugh at their misfortunes.
Laugh, and the world will laugh with you.