N, N - diethylaniline was synthesized under normal tempreture with tetraethyl ammonium hydroxide as phase transfer catalyst.以苯胺和溴乙烷为原料,用四乙基氢氧化铵作相转移催化剂,在常压下合成N, N二乙基苯胺....
Chaucer wrote in the late mediaeval period.乔叟写作的时代是中世纪末.It was survivals of the mediaeval sanctuaries.它是中世纪庇护所的遗风.It has the appearance, especially from a distance, of a mediaeval fortress.它有中古世纪堡垒的外观, 特别是从远出看....
The sea fisheries are an important industry in Norway.海洋捕鱼业是挪威一项重要的产业.Both marine and freshwater fisheries are beset by a number of very serious human impacts.无论海洋渔业还是淡水渔业,都为人类造成的一系列严重影响所困扰.Oceanic fisheries are frequent...
Cockburn engaged in a flight of fancy, never once allowing facts to get in the way.科伯恩一直在想入非非，从不曾考虑现实状况。Big business will never let petty nationalism get in the way of a good deal.大企业永远不会让狭隘的民族主义妨碍它们做大好的买卖。"We wouldn...