The special bed with a mechanical arm helps Xiaofan a lot, but it is not sold in stores.

这种带有机械臂的特殊床对小凡很有帮助，但商店里没有卖。

youdao

A mechanical arm then emerges, pulls the bike into a cylindrical well and stores it at high speed in a free location.

然后从树里会伸出一个机械臂，把自行车拉入一个圆柱形存放井里，并以很快的速度把自行车存放在空闲存车位里。

youdao

This approach can provide incredible control over an artificial arm, but patients often prefer to use simpler, mechanical prosthetics.

这种方法可以对假臂进行难以置信的有力控制，但是病人通常更喜欢使用更简单的机械式假肢。

youdao

It had a movable mechanical arm with a slender proboscis-like pipette at the tip.

NEWYORKER: Snacks for a Fat Planet

Inside the hot and dusty Bolshoi Ice Palace, workmen atop a mechanical arm installed wiring in a scoreboard above the hockey rink.

WSJ: Menu

In one memorable week last year, the hot water heater, the pool pump and the mechanical arm on the gate in their driveway all went on the fritz.

FORBES: Magazine Article