例句與造句

1. the copolymerizations of the objective monomers with methyl methacrylate ( mma ) were carried out . these polymers were characterized using ft-ir, uv, 1hnmr, and gpc . 5
   并將目標(biāo)單體與甲基丙烯酸甲酯共聚，通過(guò)~1h-nmr、ft-ir、uv和gpc等方法對(duì)聚合物的結(jié)構(gòu)進(jìn)行了表征。
2. the copolymerizations of p-methylstyrene and styrene, styrene and ethylene were also investigated using some of these catalytic systems . the three kinds of catalysts showed their own polymerization principles . the changes of polymerization activity and polymer properties depended on the structure of complexes, different polymerization conditions such as the catalyst concentration, the molar ratio of al to ti, the polymerization temperature and reaction time
   三類催化劑催化苯乙烯和p-甲基苯乙烯均聚時(shí)都有各自一定的聚合規(guī)律，不同的配體結(jié)構(gòu)，聚合條件催化劑濃度、鋁鈦比、聚合溫度和反應(yīng)時(shí)間對(duì)聚合活性以及聚合物的性質(zhì)有很大影響。
3. It's difficult to find copolymerizations in a sentence. 用copolymerizations造句挺難的