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....
Far off to the west the sun was sinking...远处夕阳西下。Far off to the west the sun was sinking.远处夕阳西下。The morale of the enemy troops is sinking lower every day.敌军的士气日益低落。The prices are sinking.物价下跌了。I began to have a sinking f...
Hawaii: Haka Tiki Mou Sha'ami Leeki Toru ( Death To Mainland Scum, But Leave Your Money ).乔治亚州: 我们给极端的正统基督教信仰注入了一些“有趣的东西”.Haka is the generic term for a traditional dance of the Maori people.“哈卡”是毛利人一种传统舞蹈的通称....
The fossils at Dinosaur Cove are embedded in hard sandstones.恐龙峡谷中的化石都嵌在坚硬的砂岩中。'This is a handy cove,'says he, at length,'and a pleasant sittyated grog - shop.“ 这海湾位置不错, ”他终于开口说道, “ 这小旅店算是选对了地方.'You a...
The high rate of desertion has added to the army's woes.高逃兵率更使部队雪上加霜。Thanks for listening to my woes.谢谢您听我诉说不幸的遭遇。She has cried the blues about its financial woes.对于经济的困难她叫苦不迭....