No moving parts are involved.

没有转动部件。

youdao

It works like a tape, except that there are no moving spools.

这一工作原理就像磁带，只是没有转动轴。

youdao

A two-stroke engine has no moving valves, and the spark plug fires each time the piston hits the top of its cycle.

二冲程发动机没有移动的阀，火花塞每次点火活塞到达循环顶端。

youdao

And one that is moving continues to move at an unchanging speed, so long as no outside force influences it.

VOA: special.2011.06.01

The things we've had in cameras for several years by putting gigabytes, soon hopefully terabytes of storage on a device that has no moving parts.

几年来我们可以在相机的存储设备,里存入千兆字节，甚至不久以后可以存入兆兆字节,设备里没有移动部件。

哈佛公开课 - 计算机科学课程节选

Generally, the feature is that they are much faster because they have no moving parts.

一般来说，这些设备存取速度更快,因为它们没有移动部件。

哈佛公开课 - 计算机科学课程节选

Plus, the solid state design means no moving parts, making the stylus incredibly reliable.

ENGADGET: Ten One ships $80 Pogo Connect, a pressure-sensitive Bluetooth 4.0 stylus for iPad

The U.S. Department of Energy researchers have designed a remarkably simple, energy-efficient engine with no moving parts.

CNN: Lab develops engine for the future

That means there's no moving parts and little risk of the music skipping during a vigorous workout or other activity.

FORBES: Rio, Redesigned