Scream, cry, laugh wildly, smile broadly.

尖叫、哭泣、疯狂地笑、满面笑容。

youdao

When you grin, you smile broadly and your teeth could be seen by others. Usually it shows your great happiness.

但你开怀大笑，你会嘴角上扬，露出牙齿——只有当你真正开心，才能笑得开怀！

youdao

Cash registers ring and store managers smile broadly as merchandise moves from counters and tables into shopping bags.

当货物从柜台和桌子装入购物袋时，现金出纳机响个不停，商店经理则笑开了怀。

youdao

When you tell the locals you live in Asia, they smile broadly and tell a story about someone they know, or met or just ate with, who was from Asia.

CNN: ASIANOW - TIME Asia | Culture on Demand: Letter from Cortona