September was crisping the Berlin air and yellowing the leaves when Pug got back.帕格回去的时候,柏林的九月空气清新,树叶正在变黄.None the less was she offended, as a flower by a crisping wind.虽说如此,她仍旧很生气, 就象花朵碰上冷风一样....
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...