marginal benefitˈmɑ:rdʒinlˈbenifitＭ 基本例句 边际效益 MBA词汇 It makes a breakthrough of the traditional theory of progressive marginal benefit decrease and brings to light the objective law of marginal benefit increase. 它突破传统的边际效益递减规律的学说，揭示边际效益递增规律的客观存在。 cnki