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 ).Surface active propertie...
His writing benefits from the shade of Lincoln hovering over his shoulder.他的写作得益于他感到已故的林肯一直在他身后激励着他。He is hovering between life and death.他处于生死之间。A flock of sea gulls are hovering over the deck.一群海鸥在甲板上空飞翔.He remained a ...
My part that protrudes from the gum has a'skin " of enamel.在我突出于齿龈的部分有一层珐琅 “ 皮 ”.The bumper protrudes forward and blends perfectly with the style of the WRC cars.保险杠向前凸出,并与在WRC赛车 风格的完美融合.The forechest is well pronou...
若IBM公司和苹果公司联手将会有什么效果呢？What will be the effect of the alliance between IBM and Apple?他决定点烤鸡配蔬菜，然后再要一份苹果派。He decided on roast chicken and vegetables, with apple pie to follow.原先苹果酒里的任何杂质在蒸馏后都会凸现出来。Any faults in the origina...