Once its impurities had settled, the oil could be graded...一旦杂质沉淀下去，油就可以分级了。The separation and determination of the primary impurities of diflubenzuron by liquid chromatography were carried out.通过反相液相色谱方法往甲醇与水的混合流动相中加入适当...
Once its impurities had settled, the oil could be graded.一旦杂质沉淀下去，油就可以分级了。A filter will remove most impurities found in water.过滤器会滤掉水中的大部分杂质。Oil is refined to remove naturally occurring impurities.油经过提炼去除天然存在的杂质。...
The spinning wheel was as symbolic of colonical massachusetts as the codfish.手纺车和鲟鱼是马萨诸塞的象征.Cecil Blount DeMille was born in Ashfield , Massachusetts in 1881.塞西尔?B? 戴米尔1881年出生于马塞诸塞州的 阿什菲尔德.If she shows her face again bac...
I loved stationery and all the accoutrements of writing.我喜爱信笺信封和所有文房用具。She seemed so experienced and self - reliant in her tinsel helmet and military accoutrements.她戴着金箔头盔,佩着士兵装备,看上去经验丰富,信心十足.The soldier was checking his...