He continued to move to and fro over the soft carpet.

他继续在柔软的地毯上来回走动。

youdao

It is a disc or collar with an irregularly shaped edge, which operates in contact with a rod or lever, and causes it to oscillate, or to move to and fro.

它是一个不规则形的圆碟或圆环，和一个杆或棒连接运作，使它上下或往来摆动。

youdao

The 8 piston bodies move to and fro, in and out, and drive the crankshaft to rotate continuously, then the power is output by the engagement of conic gears.

八个活塞体来回内外运动，带动曲轴连续旋转，再通过多对锥齿轮相互啮合的方式，实现动力的输出。

youdao

The fluids exerted a drag, causing the samples to move to and fro at the same frequency with which the machine jiggled, but with a slight delay.

ECONOMIST: How tree frogs keep their grip