N, N - diethylaniline was synthesized under normal tempreture with tetraethyl ammonium hydroxide as phase transfer catalyst.以苯胺和溴乙烷为原料,用四乙基氢氧化铵作相转移催化剂,在常压下合成N, N二乙基苯胺....
硅酮隆胸植入物a silicone breast implant一种叫作吡啶酮的新型抗艾滋病药物能促使艾滋病毒变异，使其不能繁殖，也不会再感染新的细胞。A newer anti-HIV drug called pyridinone caused HIV to mutate into a form which could not reproduce or infect new cells.所有的主要难点都涌现在烯酮 ( 1 ) 的合成中....
Tom bore up bravely through his father's illness.在他父亲生病期间, 汤姆表现得很坚强勇敢。The doctor thought the girl's illness should be kept back from her because it was cancer.医生认为不能把病情告诉这个女孩, 因为她得了癌症。My illness got me out of h...
To clone P 1 promoter of the human acyl coenzyme A : cholesterol acyltransferase 1 ( ACAT 1 ) gene.目的克隆人酰基辅酶 A: 胆固醇酰基转移酶1 ( ACAT1 ) 基因P1启动子.Age - related alteration in hepatic acyl - CoA: cholesterol acyltransferase and ...
She was a forceful intellectual unafraid to speak her mind.她是个很有魄力的知识分子，不惧怕说出自己的想法。He is unafraid to move with the times.他敢于与时俱进。She was unafraid of conflict.她不怕发生冲突。...