Gannets are denizens of the open ocean.鲣鸟栖息在外海地区。polar bears, denizens of the frozen north北极熊,在冰天雪地的北方生活的动物At length these denizens of the swamps disappeared in their turn.到了后来,连这些沼泽国的居民们也不见了....
MgO改性提高对二乙苯选择性最为明显.Silylation, P modification and MgO modification can improve p - DEB selectivity greatly.指出高效、节能的分子筛吸附分离法是分离二乙苯的最佳选择.The best choice for separating diethylbenzene is the adsorptive separation by zeolite...