burst into
1．enter suddenly；smash into 闯入；破门而入
The police burst into the room．警察突然闯进了房间。
2．begin suddenly 突然开始；突然…起来
The audience burst into applause．观众突然报以热烈的掌声。
Mary burst into laughter．玛丽突然大笑起来。
The sad story made the girl burst into tears．悲惨的故事使那女孩突然哭起来。