Back and forth, back and forth.

，你我往。

They just sort of go back and forth, back and forth.

们就是扫射。

She clasped hands about knees, rocking back and forth broken-heartedly.

她用双手搂住膝盖，前仰后合地哭得挺伤心。

Think about tennis, right, the ball goes back, and forth, and back, and forth.

想象一下网球，球跑跑去。

Traveling back and forth was a breeze.

在阿富基斯坦两国穿梭轻而易举。

He amazes as he pushes forth always turning back and forth.

令人惊讶的是，折转，奋勇向前。

So it's just back and forth, back and forth, back and forth. Often times the expenses outweigh the pay.

所以就是，，。开支往往大于收入。

They're just throwing things back and forth.

们只不过把东西丢丢去。

They actually fling it back and forth with their paddle-like tail.”

它们会用船桨似的尾把粪便抛抛去。”

I've got thrown across back and forth.

我被颠簸。

We sort of switch back and forth.

我们会切换着看。

Lions roared and paced back and forth.

狮子们咆哮着走走去。

And so he goes back and forth.

一直言论反复。

But, honey, it goes back and forth.

但是，亲爱的，这种事是时有时无啊。

Well, back and forth is a movement.

反复是一种动作。

I just kept running back and forth.

就是不停的跑。

Back and forth is the physical movement, but you can also go back and forth more metaphorically.

反复可以是身体上的运动，但你也可以用更隐喻的方式说反复移动。

And walk back and forth a few times.

也得前后走几下.

Just, like, going back and forth saying numbers.

就像是双方报数字。

And doctors were going back and forth.

医生们都在忙前忙后。