研究了用无溶剂重结晶法提纯2,6二氯甲苯.Purification of 2,6 dichlorotoluene by the recrystallization method without solvent was studied.以对氯甲苯为原料,经氯化、水解反应合成对氯苯甲酰氯,总收率. 6%.%.The total yield and 4 - chlorohenzoyl chloride. 6 % and. %.研究炭管采集空气...
He bitched about the service, then bitched about the bill.他埋怨服务不周到, 后来又埋怨要钱太多.He bitched about the poor service.他抱怨服务质量差.He bitched the job completely.他把那件事完全搞坏了....
The long - range location and forewarning is the key factor of capturing the initiative in modern war.远程定位预警是现代战争中夺取主动权的关键.Capturing the enemy - held towns is the pivot of our plans.夺取敌人控制的城镇,是我们计画的轴心.Sheriff Gifford ( J...
Wind turbines are large and noisy and they disfigure the landscape.风力涡轮机个头大、噪音响，还会破坏周边风景。He was lost in the con-templation of the landscape for a while.有一会儿，他怔怔地注视着周围的景物。The Shropshire landscape was an influence on Owen ...
The empirical evidence considered here is subject to many qualifications.此处提及的实验证据有诸多限制条件。Egypt had agreed to a summit subject to certain conditions.埃及有条件地同意了一项峰会主题。The prices of overseas holidays are subject to surcharg...