break into和burst into在意思上都有“忽然闯入”的意思，但是细看两者的意思还是有所区别的。
break into：偏向于空间上的突然改变；突然开始 (做某事)
burst into：偏向于情绪上的突然改变；突然进入 (某种状态)
eg.
The thieves broke into the bank and stole the safe.
盗贼非法强行闯入银行偷了保险箱。
The moment she was out of sight she broke into a run.
她一走出视线就突然开始跑。
She burst into tears and ran from the kitchen.
她突然哭起来，跑出了厨房。
This weekend's fighting is threatening to burst into full-scale war.
这个周末的战斗有突然升级为全面战争的危险。
break into英 [breik ˈɪntuː] 美 [brek ˈɪntu]
闯入; 打断; 突然做; 把…分成
例句：
We really need to break into the Chinese market.
我们需要打入中国市场。
burst into 英[bə:st ˈɪntuː] 美[bɚst ˈɪntu]
匆匆进入; （某处） 突然开始; （某事），突然进入（某种状态） 撞人;
例句：
She burst into tears and ran from the kitchen.
她突然哭起来，跑出了厨房。
如：(1) He broke into tears.= Suddenly he began to cry.(2) his face broke into a smile.= He suddenly smiled.
burst into:1.情绪的突然发作 2.爆发出；突然闯入.如：(1)Claire looked as if she were about to burst into tears.(2)Suddenly,the group burst into laughter.综上来看：break into 更常用的含义突然的闯入,打断；burst into 更强调情绪的突然爆发.
break into 闯入， burst into 爆发
标签：into
