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- Machine has Acryl see-through cover and is contained in a sound reduction room. 機器的外殼是透明的亞克力（樹(shù)脂）并且放置在一個(gè)消音室內。
- Finally, the future of noise active control is proposed, that is design theory and method of sound interdict strap, active sound absorption and research of new absorption material. 最后，提出噪聲控制工程的未來(lái)發(fā)展方向，即：聲學(xué)禁帶設計理論與方法，主動(dòng)吸聲，新型吸聲材料的研究。
- Physical Model on Absorbing Sound of Active Sound Absorber 有源消聲器消聲的物理模型
- A sound mind is inseparable from a sound body. 健全的精神是與健康的身體是不可分割的。
- The orient has been playing an active role in the world economy. 亞洲一直在世界經(jīng)濟中發(fā)揮積極作用。
- He is an active member of the school's stamp club. 他是學(xué)校集郵俱樂(lè )部的一名活躍會(huì )員。
- Alarmed at the first sound, we hit the dirt. 第一聲警報一響我們就迅速臥倒。
- He has told a story which sound not objective. 他講了聽(tīng)起來(lái)不真實(shí)的一個(gè)故事。
- An active volcano may explode at any time. 活火山隨時(shí)都有可能爆發(fā)。
- Is it wise to engage in active sports at your age? 我這樣的年紀積極參加體育活動(dòng)是否明智？
- She was active as a left-winger in the party. 她是黨內積極的左翼分子。
- I caught a curious sound in the neighboring room. 我聽(tīng)到隔壁房間里有奇怪的響聲。
- I was awakened by the sound of church bells. 我被教堂的鐘聲吵醒。
- He was very active and rode down several horses. 他勁頭很大，一連騎了好幾匹馬。
- The sound of danger gives wings to his flight. 危險的信號加速了他的逃跑。
- She plays an active part in local politics. 她積極參與地方政治活動(dòng)。
- I quivered with fear at the sound. 我聽(tīng)見(jiàn)那種聲音就嚇得發(fā)抖。
- The steel market will continue to be active. 鋼材市場(chǎng)將會(huì )繼續保持活躍。
- Her mouth open and shut, but no sound come out. 她的嘴張開(kāi)又閉上了，沒(méi)有發(fā)出聲音。
- An active volcano may erupt at any time. 活火山隨時(shí)可能?chē)姲l(fā)。
