MOC is made up of three parts:marginal production cost(MPC), marginal user cost(MUC) and marginal external cost(MEC).是什么意思_MOC is made up of three parts:marginal production cost(MPC), marginal user cost(MUC) and marginal external cost(MEC).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句