以酸性黑油为原料合成咪唑啉.The imidazoline was synthesized from black acid liquid.目的:探索出在咪唑啉酮2号位引入2-巯基苯骈噻唑的适宜反应条件.Objective To optimize the reaction condition of 2 - mercaptobenzothiaozole ramification.以环烷酸、有机胺为原料合成咪唑啉油溶性缓蚀剂.A new ty...
Seek mickle, and get something; seek little, and get nothing.寻找多一些,就得著一些. 寻找少一些, 就一无所得.Many a little makes a mickle; many sands will sink a ship.积少成多,集腋成裘; 积沙沉舟.Mickle power makes many enemies.势大树敌多....
He became convinced of the need for cheap editions of good quality writing.他开始相信大众对优秀作品的普及本有需求。Paperback editions prolong its life and increase his income.平装本延长了著作的寿命,使著作的收入有了增加.Scott, and later Dickens, flooded the coun...
I've managed to narrow the list down to twenty-three.我已设法把清单上的项目压缩到了23项。I was twenty-three, I suppose, and young for my age.我当时23岁，我想，看上去比实际年龄小。She's tall, blonde, twenty - three and as pure as the driven snow....