hái / zi / men / fǔ / zhǎng / dà / xiào / zhěng / gè / fáng / jiān / chōng / mǎn / le / huān / lè / de / qì / fēn

孩子们拊掌大笑，整个房间充满了欢乐的气氛。

The children clapped their hands and laughed, filling the room with a joyful atmosphere.