motor

/ˈmoʊtər/

machine that converts other forms of energy into mechanical energy and so imparts motion

中文释义：发动机；电动机

The electric motor in this car is remarkably quiet and efficient.

这辆汽车里的电动机异常安静且高效。

He repaired the boat's outboard motor before the fishing trip.

他在钓鱼之旅前修好了船的外挂发动机。