Bakelite is a well - known thermosetting material and it has a wide variety of uses.电木就是人们都熟悉的热固性材料,具有多种用途.The big black Bakelite phone rang at half past ten.十点半的时候,外壳用胶木做的电话响了.Bakelite lamp holder, what is bakelite , wh...
Sulphur is also used to sterilize equipment.硫也可用来给器材消毒。to sterilize surgical instruments给外科手术器械消毒Antiseptic is used to sterilize the skin before giving an injection.杀菌剂被用于在注射前给皮肤消毒....
Both Aldrin and Chlordane are valuable insecticides.艾氏剂和氯丹都是重要的杀虫剂.Mercury, polychlorinated biphenyls ( PCBs ) and chlordane are among the major contaminants found in Illinois fish.水银, 多氯联苯和氯丹是在伊利诺依州的鱼类中发现的主要污染物.To explo...
本文应用三乙胺催化聚合丙炔醇.The polymerization of propargyl alcohol catalyzed by triethylamine was carried out for the first time.本文首次应用三苯膦引发丙炔醇光聚合,制得黄色粉末状、具有共轭双键结构的聚丙炔醇.The photopolymerization of propargyl alcohol inpresence of trip...
The blame for the Charleston fiasco did not lie with him.查尔斯顿惨败错不在他。She seemed to be placing most of the blame on her mother.她好像把大部分责任都推到了母亲身上。Talk things through in stages. Do not accuse or apportion blame.把事情按部就班地讲清楚。不...