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 ).
But Miss Ellen she went down dar an'she nuss Emmie.可是爱伦小姐还是去了,她在那里照料埃米." I feared Emmie would die too, but I think she will live. "" 我本来担心埃米也会死, 不过现在我想她会活下去的.Emmie's baby has been born and is dying and must be ...
Complementary to the three additive light primaries, there are three subtractive primaries.与加色法三原色互为补色的颜色为减色法三原色.The mixing of additive primaries to match a specific colour.混和加色法原色,使它与某一指定颜色相似.State by state, results fro...
trenchant criticisms一针见血的批评He was shattered and bewildered by this trenchant criticism.他因这番尖锐的批评而万念俱灰，茫然不知所措。His speech was a powerful and trenchant attack against〔on〕 apartheid.他的演说是对种族隔离政策强有力的尖锐的抨击。He formulated trench...