A device consisting of fixed and moving parts that modifies mechanical energy and transmits it in a more useful form. 機床一個由固定和可移動部件組成的裝置，可以把機械能轉化為其他更為有用的形式
The technology of using the flows and pressures of fluids in sensing, control, and information-processing systems with no moving parts. 射流技術一種利用流體動力現象使不運動部件來完成感測、控制和信息傳送等功能的控制技術
Oil the moving parts of this machine regularly. 要定期給這部機器的運轉部件上油。
In order to reduce friction, the moving parts of a machine are often oiled. 為了減少摩擦，機器的可動部件常常塗上潤滑油。
