在许多细胞中,含量最高的磷脂是磷脂酰乙醇胺或脑磷脂.The most abundant phospholipid in many cells is phosphatidyl ethanolamine or cephalin.乙醇胺在气体的纯化和分离方面也是有用的.Ethanolamines are also of value in the purification and the separation of gases.利用不经提纯的棉...
药物分为内服药与外用药两类.Medicines are broadly classed as internal or external ones.很多内服药就是催化反应的产物.Many medicines are products of catalysts.这是内服药. 一天四次,每次两片.This is for internal use. Two tablets, four times a day....
They were, by and large, a very wealthy, privileged elite.他们基本上是一些非常有钱有势的精英。By and large, these people are peace-loving, law-abiding citizens.大体上，这些人都是热爱和平、遵纪守法的公民。Taking it by and large, the conditions of employment are...
Her face was a revelation of age and dissipation.她的脸暴露了她的年龄和放荡的生活。the dissipation of energy in the form of heat以热量形式耗散的能量Don't permit yourself in dissipation.不要放任自己....