急刹车使他摔倒了。

A sudden braking tumbled him down.

所以我们不得不对收购行动采取急刹车来应付这一问题。

So the acquisition came to a screeching halt while we tried to sort this out.

在固定的节奏下，车子一会儿突然向前，一会儿急刹车，我的脑袋就像个饶舌歌手一样前摇后晃。

"In a constant rhythm, as the car lurches forward and then stops short, snapping my head back and forth like a rap singer."