cog

A broken cog stopped the old clock from working. ▶

一个断裂的轮齿让那座老钟停止了运转。

Employees may lose motivation if they feel like a cog in a machine rather than valued contributors.

如果员工觉得自己只是机器中的小零件，而非受到重视的贡献者，就可能失去动力。