portable motor的用法和樣例：
例句
- An air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation.
在快速長途運輸中，氣冷式電動機比巫婆的掃帚更有效。 - Hayward Tyler Ltd is celebrating 100 years since designing the first submersible electric motor.
海伍得泰勒有限公司即將舉行潛水式電動機百年慶典。
