marginalin臀腺素marginaladj.边际的；末端的；仅以微弱多数获胜的；微小的marginal expense边际费用marginal revenuen.边际所得总额marginal quarter边缘区marginal profits限界利润Marginal process边际化过程marginal returns边际利润率marginal species边缘种marginal fissure边缘裂缝marginal element边缘成分marginal bristle腹缘鬃