He paced back and forth.

他来回踱步。

《柯林斯英汉双解大词典》

The windshield wipers clacked back and forth.

挡风玻璃上的刮雨器来回刮着，发出咔嚓声。

《柯林斯英汉双解大词典》

The people swayed back and forth with arms linked.

人们手拉手前后摇摆着。

《柯林斯英汉双解大词典》

The road moves back and forth and around corners as it moves up the face of the mountain.

VOA: special.2010.09.08

These two oscillate back and forth so the moment of deprivation is often then balanced by a moment of imagination.

来回交替丧失的时刻,经常和想像的时刻,互相平衡。

耶鲁公开课 - 1945年后的美国小说课程节选

Because there are ions moving back and forth, there's a current that flows and there's a electrical potential that's generated.

由于离子的进进出出,就产生了电流流动,并且形成了电势差

耶鲁公开课 - 生物医学工程探索课程节选

Zebras, rhinos and elephants roam the fields, while big cats nervously pace back and forth in cages.

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And people were just making a lot of money, trading it back and forth, in and out.

NPR: Wall Street Too Real? Try Fantasy Investing

And there's a lot of back and forth - of trade and people - between the two.

BBC: Scotland: Treasury wants a pound for a pound