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 )....
It was concluded that there were arteriovenous anastomosis in yak's heart.牦牛心室肌中存在着动静脉吻合.The treatment dural arteriovenous fistula are still controversial now.对小脑幕动静脉瘘的治疗目前仍存在很多争论.Tentorial dural arteriovenous fistu...
In the city squares the neon lights flashed in turn.在城市广场上，霓虹灯依次闪烁。He hated the superficiality, the neon glamour and the cheap prettiness of life in L.A.他痛恨洛杉矶浮华浅薄、灯红酒绿、纸醉金迷的生活。And neon - 21 was found in josephinite by t...
Till I come , give attendance to reading , to exhortation, to doctrine.13你要以宣读, 劝勉,教导为念, 直等到我来....theorists unaligned with any particular doctrine.不附和任何教条的理论家...the doctrine of absolute monarchy based upon divine right.以...