A large proportion of the fluorine is vaporized during the concentration process.在浓缩过程中大部份氟蒸出.health effects of fluorine pollution氟污染对健康的影响If the fluorine content is high, it may increase plant corrosion.如果氟的含量高, 会加剧设备的腐...
You can use this software to burn custom compilations of your favorite tunes.你可以用这个软件来刻录你最喜欢的乐曲。The Beatles' Red and Blue compilations are issued on CD for the first time next month.下个月，披头士乐队的专辑《红与蓝》将首次发行CD。Introduc...
He has the occasional cigarette, but mostly he smokes a pipe.他偶尔抽香烟, 但通常是抽烟斗.He must limit the number of cigarettes he smokes.他必须限制他抽烟的数目.The girls bludged smokes.那些女孩子要烟抽。I don't like her because she is too tall an...