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(cháng)途運輸中，氣冷式電動(dòng)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(dòng)機百年慶典。
