multiple duct造句

例句与造句

1. With noise pollution being an important concern , the company has constructed a multiple duct system in the volantor with an expectancy to generate low fan noise
   有鉴于噪音污染是大家关切的课题，该公司已为飞行器设计一套多风道系统，希望能降低风扇的噪音。
2. It's difficult to find multiple duct in a sentence. 用multiple duct造句挺难的