词汇	Bi Qun
释义	Bi Qun 毕群
随便看	marginal platelet marginal plates marginal platform marginal plexus marginal point marginal points marginal pool marginal population marginal pore marginal portion marginal position marginal possibility distribution Marginal Poverty marginal preference marginal pressure marginal price marginal pricing marginal primal cost marginal prime cost marginal principle marginal private costs marginal probability marginal probability density marginal probability density function marginal probability distribution