Sybil see-sawed the car back and forth.

西比尔将车前后来回地开着。

Someone was pacing back and forth behind the curtain.

有人在幕布后踱来踱去。

Insults were hurled back and forth between the two writers.

这两个作辱骂。

The rope swung back and forth from the branch.

绳子在树枝上来回摇晃。

This ominous, goateed man waves a pocket watch back and forth, guiding his subject into a semi-sleep, zombie-like state.

这个不吉利的、尖胡子男人来回晃一只怀表，引导他的受测人进入了一个半睡眠、僵尸般的状态。

In the Gulf of Mexico, trawlers ply back and forth year in year out, hauling vast nets that scarify the seabed and allow no time for plant and animal life to recover.

在西湾，拖网渔船年复一年来来往往地“辛勤”劳作，拖着巨大的渔网，刮破了海底，没有给植物留下恢复的时间。