operated by a machine, or connected with machines or their parts

a mechanical device 机械设备

The company produces mechanical parts for airplane engines. 这家公司生产飞机引擎的机械部件。

The plane appeared to have crashed because of a mechanical problem. 这架飞机看来是因机械故障而坠毁的。

relating to movement, or to mechanics (= the study of the effect of physical forces on objects and their movement)

a study of the effects of mechanical forces on bones 有关机械力量对骨头作用力的一项研究

without thinking about what you are doing, especially because you do something often

He gave a mechanical response. 他习惯性地作出反应。