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 ).N - hydroxyethylpyrrolidone ( NHP ) was synthesized from � � - butyrolactone and ethanolamine on Y molecular sieve catalyst by two steps....
The magazine is devoted to anato-mizing the inadequacies of liberalism.该杂志致力于剖析自由主义的不足之处。To be wordly - wise and play safe is one of the manifestations of liberalism.明哲保身是自由主义的表现之一.That the communitarianism emerges as th...
Matters concerning regimentation, development, and administration of community areas.二三关于社区编定 、 开发及管理事项.Discipline without regimentation was Miss Bulstrode's motto.既注意纪律,又不造成一律化,这就是布尔斯特罗德小姐的座右铭.Using the imported sp...
为了挣点外快，她什么都肯做。She'd do anything for a bit of pin money.他偶尔会表演单口喜剧赚取外快。He supplemented his income with occasional comedy gigs.意识到自己快要退休了，他想要挣些外快。Realizing that his retirement was near at hand, he looked for some addi...
Especially when I feel seasick, I can't stand watching someone else vomiting. "尤其晕船的时候, 看不得人家呕. ”When I get seasick, I throw up my food.我一晕船就呕吐。I felt seasick so I went up on deck for some fresh air.我有些晕船, 所以到甲板上去呼吸...
逐步的变化比突然的 、 大规模的变化更好.Gradual change is preferable to sudden, large scale change.户点王也在开始逐步的上升阶段.The household spot king is also starting the gradual ascent stage.并且正逐步的成为中高阶层的养老镇了.Fairhope is swifty becoming a retirement ...
Two phase - shift - networks of frequency discriminator are given circuit and layout examples.本文较详细地分析了鉴频器用移相网络的特性和集成化难易点.Quartz crystal, crystal oscillator, ceramic resonator, ceramic filter, saw filter, ceramic discrim...