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。...
现在经济开发区怎样了?How is the economic development zone going on?城市的这一部分已被划为重新开发区.This part of the city has been zoned for redevelopment.该城已被定为开发区.The town has been designated ( as ) a development area....
现在看来似乎悲观论者是正确的。It looks as if the pessimists are being proved right.哈代由于对生活持过度悲观的态度而常常受到批评。Hardy has often been criticised for an excessively pessimistic view of life.我是天生的悲观主义者。我总是做最坏的打算。I'm a natural pessimist; I ...
It will produce electricity more cheaply than a nuclear plant.它的发电成本要比核电站低。The cost of electricity from coal-fired stations is expected to fall.用煤作燃料的火力发电站的成本有望降低。The building had been trashed and its electricity supply ...