The catalysts and processes for conversion of aromaticswere reviewed , especially those for catalytic hydrodealkylation and transalkylation. 重点阐述了催化加氢脱烷基和烷基转移反应特点和有关催化剂的研究以及国内外主要工艺发展现状.
By drilling, geologists can take measurements at various depths.通过钻探，地质学家可以在不同深度测量。Drilling is due to start early next year.钻探将于明年早些时候开工。The team is still drilling.钻探队还在钻探。...