break down  击碎，出故障，失败，分解，分离或分类

　　My car broke down again. 我的汽车又出毛病了。

　　Not again! This is the third time you've broken my MP3 player! 又来了！这是你第三次弄坏我的MP3播放器了！

　　Everything can be broken down into three categories. 每个东西都可以分为三种类型。

　　Did your car break down again? 你的轿车又出故障了？

　　It did, and that's the third time in two weeks.  是啊，两个星期之内坏了三次了。