They also play an important role in immune reactions.它们在免疫反应中也起着重要的作用.Nonbiological degradation processes play an important role in the dissipation of many pesticides in soil.非生物降解过程在消除土壤中的许多农药方面起着重要的作用.Variational princ...
这篇课文把相当复杂的主题讲述得深入浅出、通俗易懂。The text is approachable, coping well with quite complicated subjects.课文索然无味。The text is banal.他早期的戏剧作品现在是大学指定课文。His early plays are set texts in universities....