Definition: to suddenly start laughing/crying/shouting, etc. Level: B2
他看了一眼她戴的帽子，突然大笑起来。
He took one look at the hat she was wearing and ___burst ___out laughing.
我突然哭了起来，因为我的围裙完全烧焦了。
I ___burst ___out crying because my apron had burned completely.
当歌手出现在舞台上时，观众突然大喊起来。
The audience ___burst ___out shouting when the singer appeared on stage.
