Diisopropyl succinate was synthesized from succinic acid and isopropanol with p - methyl benzenesulfonic acid as catalyst.摘要以丁二酸和异丙醇为原料及对甲基苯磺酸为催化剂,催化合成丁二酸二异丙酯.Diisopropyl phosphite was directly synthesized from phosphoru...
The system was state of the art.这一系统是当时最先进的。State - of - the - art suspension guarantees a smooth passage over the bumpiest road.最先进的减震悬架保证汽车在最崎岖不平的道路上也可以平稳通行.They are using state-of-the-art graphics in the film's s...
"Go and have a word with her, Ken," Webb instructed.“肯，去和她谈谈吧，”韦布吩咐道。Ken's jaw jutted with determination.肯坚定地扬起下颌。Ken passed the books to Sergeant Parrott.肯把那些书递给帕罗特警官。...