"burst into" in Chinese (Simplified)
突然进入突然开始（哭/笑等）
Definition
突然强烈地开始做某事，比如哭、笑或唱歌；也可以指突然闯入一个地方。
Usage Notes (Chinese (Simplified))
常用于表达情感突然爆发，如“burst into tears”（突然哭了起来）、“burst into laughter”（突然笑了起来），也可以用于突然进入某地。不要用于普通的动作比如跑步。
Examples
She burst into tears when she heard the news.
她听到消息后**突然哭了起来**。
The children burst into laughter at the funny joke.
孩子们听了笑话后**突然笑了起来**。
Suddenly, he burst into the classroom, looking excited.
突然，他**闯进了**教室，看起来很兴奋。
When they announced her name, she burst into song.
当他们叫到她的名字时，她**突然唱了起来**。
He saw the mess and burst into anger.
他看到乱七八糟的场面，**突然生气了起来**。
They all burst into applause when the show ended.
演出结束时，他们大家**突然鼓掌起来**。