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