burst into laughter 突然大笑起来 burst with laughing 捧腹大笑 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 高兴得裂开嘴笑 a hearty burst of laughter 一阵尽情的欢笑 in stitches

burst into laughter                             突然大笑起来

burst with laughing                            捧腹大笑

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                                高兴得裂开嘴笑

a hearty burst of laughter                  一阵尽情的欢笑

in stitches                                         笑不可支，忍不住大笑

an infectious laugh                            有感染力的笑声

laugh in the breeze                            迎风欢笑

laugh oneself to death                       笑得要死

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                           笑得发胖，心宽体胖

laugh at a joke                                 听了笑话而发笑