cost-benefit principle

cost-benefit principle cost-benefit analysis是什么意思 什么是成本原则（cost principle) opportunity cost benefit forgone 是什么意思? 中文解释margin,marginal benefit,marginal cost和ceteris paribus 英语翻译1.Giventhe cost benefit of natural gas over gasoline and 经济边际效应,margin change\margin cost\margin benefit在这两个例子里各指? principle是什么意思 principle翻译 Relocation benefit 贝玲妃 Benefit taxable benefit