A new type gemini surfactant was synthesized from 1,4 - butanediol , maleic anhydride and 1 - octadecanol.采用1,4- 丁二醇 、 马来酸酐及十八醇为主要原料,合成出一种双子表面活性剂1, 4- 丁二醇双琥珀酸十八醇双酯磺酸钠.The catalysis of big pore strong acid resin for 1, 4 ...
I found his amiability charming.我觉得他和蔼可亲，富有魅力。His amiability condemns him to being a constant advisor to other people's troubles.他那和蔼可亲的性格使他成为经常为他人排忧解难的开导者.I watched my master's face pass from amiability to ste...
The air pollution exceeds most acceptable levels by 10 times or more.大气污染程度超出了普遍认可的标准10倍或更多。The demand for places at some schools exceeds the supply.某些学校的入学申请人数超过了招生。Its research budget exceeds $700 million a year.其研究预算每...
We corresponded regularly.我们定期通信。Janet and Bob corresponded for many years before they met.珍妮特和鲍勃会面之前已通信多年.Mary and Tom had corresponded with each other before they met.玛丽和汤姆见面前已互相通过信....
Colloidal particles are bombarded by molecules of the dispersion medium.胶粒会受到分散介质分子的碰撞.Small molecule atomic particles, atoms extranuclear electron transfer.份子原子小粒子, 原子核外电子转.The pans were held in both hands and swirled a...
The black mater metal plate is called a collector, there.这个黑色金属板叫做吸热器.In metal lubrication two distinct regions are recognized: boundary and hydrodynamic.在金属的润滑作用中存在两个不同区段: 边界和流体区.Getter - ion pumps decrease chamber pres...