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。...
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...
We must be almost to Denver.我们一定快到丹佛了.A green - technology industry is budding — rivalled by Denver, Boston and, of course, California.面对其竞争者丹佛市, 波士顿, 当然还有加利福尼亚,绿色科技产业正在这里慢慢兴起.Denver had won the championship by defeating...
He flinched at the sight of the blood.他一见到血就往后退。Fache flinched, his eyes riveted on the second agent.法希毫不畏缩, 他的眼睛一动不动地注视着那名特工.He flinched, but didn't stop pulling Fred to safety.他缩成一团, 但还是坚持把佛瑞德往安全的地方拖....