总效用与边际效用（Total Utility and Marginal Utility） a）总效用是效用的总量，而边际效用则是总效用总量的变动率，即总效用函数的微分。
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total utility and marginal utility
总效用和边际效用
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It is the rate of change in total utility per unit change in quantity and is not the utility of a marginal unit.
它是（商品）量的每单位变动带来的总效用变动率，而不是边际单位的效用。
youdao
Just as diminishing marginal utility means more of something adds less and less to total utility (bank reserves), it also means that less of something (bologna) will raise its utility at the margin.
FORBES: Tom T. Hall's Week in Jail, the Jailer's Wife's Bologna, and Monetary Policy
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