战乱之后瘟疫接踵而来.After the scourge of war came the scourge of disease.他们因那年严冬的饥饿与瘟疫而折磨得发狂.They were crazed by the famine and pestilence of that bitter winter.当时瘟疫正在该城流行.Plague was then prevailing in that city....
The Octane Number is retained owing to HZSM 5 � � s excellent ability of aromatization, isomerization and alkylation.HZSM-5沸石对汽油的降烯烃作用得益于其优异的芳构化 、 异构化和烷基化性能.These derivatives are readily obtained by alkylation of 2 - mer...