任选的是, 可用加氢催化剂将纯化的二聚异丁烯加氢生成异辛烷.Optionally, the purified diisobutylene may be hydrogenated to isooctane hydrogenation catalyst.应用正碳离子聚合的方法合成新型聚异丁烯遥爪预聚物.The new telechelic prepolymers of polyisobutylene have been synthesize...
他用右手抓住了一块凸起的岩石。He grabbed at a protrusion of rock with his right hand.他举起右手刚刚能够到那个男人的头。He could just reach the man's head with his right hand.他右手食指骨裂。He suffered a hairline fracture of the right index finger....
Innovation is another key part of the Canada - China partnership.创新是中加关系另一关键部分.On estime que quelque 130 000 personnes d'origine ha ? tienne vivent au Canada.预计有约12万海地人来加定居.Imprisoned lake, under Canada rainstorm, m...