我不知道如何使用同温层观察镜。I don't know how to use the stratoscope.关于同温层中的粒子这一问题将另行讨论.The subject of stratospheric particles will be discussed separately.两类物质分别在同温层和对流层氧化降解.Chlorofluorocarbons and hydrochloroflorocarbons are ox...
Daily facial exercises help her to retain the skin's elasticity.每天做面部运动帮助她保持皮肤弹性。She had suffered severe facial mutilations after an accident.她在事故中被严重毁容。I ended up in hospital with facial injuries.我落得个面部受伤，进了医院。...
The invention relates to a cationic polymer dehydrator for sludge.本发明涉及一种用于污泥脱水的阳离子型聚合物脱水剂.The vibrating centrifugal dehydrator and scraper discharge centrifugal dehydrator are usually used in coal mine industry.振动离心脱水机与...