burst into laughter 突然大笑

crack a smile 展颜微笑，莞尔一笑

explode with laughter 哄堂大笑

force a smile 强作欢颜

burst into gales of laughter 爆发出阵阵笑声

grin with delight 高兴的咧嘴而笑

a hearty burst of laughter 一阵爽朗的欢笑

in stitches 笑不可支

laugh at 嘲笑

laugh it off 一笑而过

laughingstock 笑料;笑柄

laugh in the breeze 迎风欢笑

laugh oneself to death 差点没笑死

laugh people around into a better humour 笑得周围的人心情好起来

laugh a hearty laugh 放声大笑，开怀大笑

laugh and grow fat 心宽体胖

roars of laughter 大笑声

a saccharine smile 谄笑，谄媚的笑

roll in the aisles 乐不可支，笑得东倒西歪

scream with laughter 笑得前仰后合

snicker 窃笑

snort (讽刺、轻蔑地)高声大笑

shriek with laughter 尖声狂笑

smile shyly 羞嗒嗒地微笑

beam with smiles 笑容满面;笑逐颜开

be all smiles 笑容满面, 喜气洋洋

toothpaste smile [美口]牙膏广告上露出皓齿的微笑

simmer with laughter 忍俊不禁

smile on sb. 朝某人微笑

smirk 傻笑;假笑

smile bitterly 苦笑

giggle 咯咯地笑

grin 咧嘴而笑

grin from ear to ear 嘴咧得大大地笑

chuckle 轻声笑;咯咯笑