泵的抽气速率与气体的性质有关.Lashing velocity of pump is concerned with nature of air.现在已经采用了低温吸附技术和吸气离子泵的近代电子抽气设备.Recent electronic means of pumping using low temperature sorption techniques and getter - ion pumps have been introduce...
673家私人高尔夫俱乐部参与了最近的研究。673 private golf clubs took part in a recent study.我的私人生活不得不让位于事业。My personal life has had to take second place to my career.体验私人游艇的乐趣和奢华。Discover the delights and luxury of a private yacht....
The whole gas which is colliding with the oscillator cools off.与振动子碰撞的整个气体将逐渐冷却.The molecules bounce off each other like two colliding billiard balls.当分子相互弹开时就象两个碰撞的弹球.After colliding, both cars turned turtle.碰撞后, 两部车都翻个...