N - hydroxyethylpyrrolidone ( NHP ) was synthesized from � � - butyrolactone and ethanolamine on Y molecular sieve catalyst by two steps. 以改性Y分子筛为催化剂,γ-丁内酯和乙醇胺为原料,采用γ - 丁内酯法两步合成N - 羟乙基吡咯烷酮 ( NHP ).
He ladles out compliments to everyone, but he’s not really sincere.他见人就大加吹捧, 但并非出于诚意。As the English teacher is sincere and patient, every student of the class wants to be friends with her.英语老师待学生诚恳耐心, 大家都愿意亲近她.I never fe...
A: 菲利斯,你今天好像很不自在似的.A : You don't seem to be yourself today, Phyllis.当菲利斯·本森感到有压力时, 她知道她该去哪里.When Phyllis Benson feels stressed, she knows just where to go.除了名牌的花生酱,菲利斯什么也不会买.Phyllis won't buy anything but brand...
Most visitors to New York gravitate to Times Square.大多数来纽约的游客都被吸引到时代广场.Don't gravitate to one side, or the boat will upset.别都移向一边, 否则船会翻的.If you all gravitate to one side, you'll upset the boat.如果大家都移向一边, 船就要翻了...