在流水线上工作多年后，他的动作变得纯粹是机械的。

After years on the assembly line, his movements had become purely ___mechanical.

我们最终以如此机械的方式做事，以至于行动的真实精神在我们内心消亡了。

We end up doing our things in such a ___mechanical way that the actual spirit of doing dies in us.

他的钢琴演奏技术完美，但感觉机械且毫无灵魂。

His piano playing was technically perfect but felt ___mechanical and lacked soul.