总效用是指消费一定数量的某种物品得到的总的满足程度。总效用的大小取决于个人的消费水平，即消费的物品与劳动数量越多，总效用越大。 函数形式可表示为：TU=f(x)
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。
It is the rate of change in total utility per unit change in quantity and is not the utility of a marginal unit.
人们选择Linux这样的操作系统，是因为它在各方面的优点—它的总效用。
The reason people go for an operating system like Linux is the sum of its parts-its total usefulness.
通过敏感性分析，消费替代弹性对总效用及生物柴油占柴油燃料份额的影响较显著。
With the sensitivity analysis for parameter, it shows that the substitution elasticity for consumption has prominence influence to the welfare and the share of biodiesel.
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