burst into是什么意思

　　例句：

　　1.Gunmen burst into his home and opened fire.

　　持槍歹徒闖入他家，開了槍。

　　2.She and her two daughters were held at gunpoint by a gang who burst into their home.

　　她和她的兩個女兒被一伙闖入家中的歹徒持槍挾持。

　　3.He burst into laughter, not hollow laughter now, but honest laughter.

　　他突然大笑起來，不是空洞的假笑，而是貨真價實的笑聲。