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...
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...
他很有眼力，慧眼识英才。He had the insight to recognize their talents.就择夫选婿而论,她的眼力不怎么样.She doesn't rate high as a picker of husbands.他眼力过人.He's a man of excellent judgment....
黄油、人造黄油和多脂鱼都含有丰富的维生素D。Butter, margarine, and oily fish are all good sources of vitamin D.作为食品配给制的一种遗留影响，他们总把黄油和人造黄油混在一起吃。As a hangover from rationing, they mixed butter and margarine.向日葵所制人造黄油的脂肪含量与黄油脂肪含量相同。Sunflower mar...
别那么傻头傻脑的！Don't be such an ass!祥子晕头打脑的没甚听明白,可是有些害怕.Xiangzi, his head bung, didn't understand but began to feel afraid.如果说她是那个天真烂漫的小姑娘, 波洛克就是那个笨头笨脑的小伙子.If she was the naive girl, Guy Pollock was the clumsy boy....
Hey, I know what, I'll get a bumper sticker printed up.嘿，有了，我会找人印刷一些保险杠贴纸。In the state of Iowa, it's been a bumper year for corn.艾奥瓦州今年玉米大丰收。The painting represents the scene of a bumper harvest.这幅画描绘了丰收的景象....
本文根据实验事实,阐述了烷基的负诱导效应.In this paper, negative induction effect of alkyl is discussed base on the experiment facts.季铵盐中烷基的转移具有较好的选择性,其优先顺序为:苄基>伯烷基>仲烷基.Excellent selectivity in alkyl transfer was noted in the sequence of Ph...