mechanical

飞机似乎因机械问题而坠毁。

The plane appears to have crashed because of a ___mechanical problem.

缺乏热情，我们就有可能以纯粹机械化的方式工作。

Without passion, we risk doing our jobs in a purely ___mechanical manner.

他决定成为一名机械工程师，以设计创新机器。

He decided to become a ___mechanical engineer to design innovative machines.