break out  出现，发生，突然开始，脱离（...of）

　　The fire broke out last night. 昨天晚上突然着火了。

　　I really want to break out of here. 我很想从这里逃出去。

　　She broke out into a smile and stood up. 她突然开始大笑，站了起来。

　　What were all of those sirens? 那是什么声音？

　　Three criminals broke out of jail.  3名罪犯越狱了。