他们刚离开，扛着步枪的士兵们就到了。Scarcely had they left before soldiers arrived armed with rifles.他们持有的步枪、机枪、地雷和催泪弹数量惊人。They possess a formidable arsenal of rifles, machine guns, landmines and teargas.汤姆走在前面，背上挂着一支步枪。Tom was leading, a...
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...
Paul swam in his ungainly way to the side of the pool.保罗笨拙地游到池子边。On land the turtle is ungainly, but in the water it is very agil.乌龟在陆地上很笨拙, 但是在水里却很灵活.I thought him terribly ungainly when he danced.我觉得他跳舞时显得极其笨拙.He was a...