目的: 合成新的双-胡椒醛缩二胺类席夫碱化合物.Methods: Five Schiff bases were prepared from piperonal and diamines by condensation reaction.用胡椒醛为起始原料,经氯化 、 水解、缩合,制得血凝酸胺.After the process of chlorination, hydrolytic decomposition and condensat...
The schools produced diligent excerpting from older manuscripts, summarizing, and commentaries.各学院从古代手稿里作了辛勤的摘录 、 总结和评注工作.The schools produced diligent excepting from older manuscripts, summarizing, and commentaries.各学院从...
桨的根部使用了高强度塑料夹片, 增加了可靠性和安全性.The grip of the blade is made of high - strength plastic, which improve the reliability and safety.其索具由球头索杯 、 夹片及其O型圈构成.The rigging consists of a ball head line cup, a clamping piece and an O r...
He can dull your senses with facts and figures.他会用事实和数据蒙蔽你的理智。May her death bring these people to their senses.但愿她的死能让这些人醒悟。You sold it? You must be out of your senses!你把它卖了? 你简直是疯了!...