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 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....
North American dark bluish - gray gallinule.北美深蓝灰色的水鸡.The pumpkin is the only esculent of the orange family that will thrive in the North.南瓜是柑橘科中唯一能在北方种植的蔬菜.They sailed across the Baltic and North Seas with only a compas...
那时他的脸因为晒伤而脱皮。His face, at the moment, was peeling from sunburn.严重的脸部或背部晒伤会非常疼痛。A badly sunburned face or back is extremely painful.她的皮肤晒伤了，使得想要亲热一下都变得很痛苦。Her sunburn made intimacy too painful....
对于“民俗学是什么”,学界内外存在着普遍的误解.Misunderstanding of folklore exists inside and outside of the academic field.民间美术既接近于一般的专业美术,又接近于民俗学.This paper proposes two Methods : To study and sum up it....