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...
There was constant jeering and interruption from the floor.议员席上不断有人在嘲讽和打岔.He was holding a cloth that dripped pink drops upon the floor.他正拿着一块布，布上粉红色的水滴落在地板上。She had been sitting with her knitting at her fourth-floor win...
I will have to part company with you on this point.在这一点上我只好和你各执己见了.Where I part company with him, however, is over the link he forges between science and liberalism.然而，我与他产生分歧的地方是，他把科学与自由主义联系了起来。It's sad that we hav...
You'vebeen drifting from job to job without any real commitment.你一直在无目的地更换工作，从未真正投入进去。Cool summer dance sounds are drifting from the stereo indoors.清凉的夏日舞曲的声音从室内音响中传了出来。His hair was drifting about his shoulders like...
Etherification of butanol with ethylene oxide by a new style solide acid catalyst is investigated.研究了丁醇和环氧乙烷在一种新型固体酸催化剂上的醚化反应.The purified rice amylose and amylopectins were obtained by n - butanol recrystallization meth...