Amphoteric monomer is prepared with acrylic acid , dimethylamine and chloroethanol by Mannich reaction.以丙烯酸、二甲胺、环氧氯丙烷为原料,通过曼尼希反应制得两性离子单体.Biological activities of amphoteric surfactants to higher or lower organisms were i...
Reactions in liquid HF are known that illustrate also amphoteric behavior, solvolysis, or complex formation.已知在液态HF中,也能说明两性行为溶剂分解或络合物形成作用的反应.Biological activities of amphoteric surfactants to higher or lower organisms we...
The canine is impacting on the incisor.犬牙和门牙挤压在一起。...the sharp tinkle of metal impacting on stone...金属撞击石头发出的刺耳叮当声Distributive characters of hypervelocity fragments impacting double - level target were researched.研究了超高速破...
The popular ceramics industry expanded towards the middle of the 19th century.到19世纪中期，大众制陶业得到了发展。The service is being expanded following the success of a pilot scheme.在试验性方案获得成功后，这项服务正在推广中。Transport networks need to be e...
Selective breeding may result in a greyhound running faster and seeing better than a wolf.选择性交配繁殖有可能培育出比狼速度更快、视力更佳的灵犭是。The wolf snapped at the hunter's hand.这匹狼咬住猎人的手。It is 250 years since the wolf became extinct in...
Sam snuggled down in his pillow and fell asleep.萨姆舒服地枕着枕头进入了梦乡。Tendrils of hair strayed to the edge of her pillow.她的几缕头发散落在枕边。The pillow cover can match up with the sheets.这条枕巾可以和床单配上。...