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

她用双手搂住膝盖，前仰后得挺伤心。

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

令人惊讶的是，他来回折转，奋勇向前。

And doctors were going back and forth.

医生们都在忙前忙后。

Traveling back and forth was a breeze.

在阿富汗和巴基斯坦两国来回穿梭轻而易举。

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

他们就是来回扫射。

In this stage, the brain is extremely active and our eyes, although closed, dart back and forth as if we were awake.

在此阶段，脑会非常活跃，虽然我们的眼睛闭着，但会来回快速移动，彷彿我们醒着一样。

They're just throwing things back and forth.

他们只不过把东西丢来丢去。

In the United States, society is highly mobile and it is quite common for people to move back and forth across the country for a new job, education, or many other reasons.

在美国，社会流动极高，人们因为新工作、教育或其他许多原因而在国内搬来搬去是司空见惯的事。

Zazu's head swiveled back and forth between the two brothers.

沙祖的头在两兄弟之间来回转动。

I've got thrown across back and forth.

我被来回颠簸。

Auto parts get carted back and forth between assembly plants in Ontario and Michigan.

汽车零部件在安略省和密歇根州的组装厂之间往返运送。

Her tail swished slowly back and forth, eyes fixed on the pumpkins.

她的尾巴缓慢左右摆动，眼睛紧盯着南瓜。

While he must remain in isolation until he tests negative for the virus on three consecutive days, he is passing the time by pacing back and forth in his room.

在他继续隔离直至连续三天的病毒检测期间，他只能在房间里来回踱步打发时间。

The weather grew breezier, brighter and warmer as the holidays passed, but Harry, along with the rest of the fifth-and seventh-years, was trapped inside, traipsing back and forth to the library.

复活节假期结束以后，刮起微风的日子越来越多，天气一天比一天晴朗、温暖，但是哈利。还有其他五年级和七年级的学生，都被困在屋子里，复习，疲惫在图书馆里进进出出。

Even though the wiggling back and forth of the star is too small to measure, that doesn't mean the effect is undetectable.

尽管恒星来回摆动的幅度太小，无法测量，但这并不意味着这种效应无法被检测到。

The odds would change back and forth all night and they fed the Negro rum and lighted cigarettes for him.

一整夜，赌注的比例来回变换着，人们把朗姆酒送到黑人嘴边，还替他点燃香烟。

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

想象一下网球，球跑来跑去。

I might as well have asked: Do I flip back and forth in just the same way?

我是否一样反复无常？

While the farmers are busy in the fields, the swallows fly back and forth with material for their nest.

当农户们忙碌在田埂间时，飞燕们则衔着修整巢穴的材料来来往往。

Afterward, they said they'd had success in negotiating a stop, at least a temporary one to the back and forth tariffs or taxes that the two countries have placed on imports of one another's goods.

之后，他们说他们已经成功协商出了一个站点，至少是暂时的对两国之间对进口货物征收的来回关税或其他税收。