Translation of "backs" into Chinese

Black people had to sit in the back of the bus, or stand if the back was full.

黑人不得不坐在公交车的后面,如果后面的座位满了则只能站在那里。

Just throw it in the back of the cab or something.

只要 把 它 扔 在 后面 的 驾驶室 或 东西 。