This is a fractionating tower.这是一座分馏塔.As the solution to be purified is heated, its vapors rise to the fractionating column.当要被提纯的液体受热时, 它的蒸汽上升到分馏柱.The utility model relates to a continuous thin film evaporation device p...
They are mainly forest scavengers infesting damp, rotted wood.它们主要是些森林食腐动物,多侵害潮湿腐朽的木材.The category and scavenging mechanism of free radical scavengers were also presented.概述了自由基的概念、对人体的危害以及自由基清除剂的种类和作用机制.Antioxidants, in...
The country's economic plight is strangling its scientific institutions.该国的经济困境阻碍了其科研机构的工作进展。Last year, economic growth tailed off to below four percent.去年，经济增长率下降到4%以下。Predicting voting trends from economic forecas...