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...
He sang much more sweetly than he has before.他的演唱比以前要动听许多。He heard the car engine running sweetly beyond the open door.他听到敞开的门口外的汽车引擎运转正常。I just smiled sweetly and said no.我只是甜笑着婉拒了。...