个人边际成本
个人边际成本-
如今多暗线监视一个人的边际成本基本为零，Soghoian博士这样说道，现代监管的经济方式对消费者并不有利。
The marginal cost of spying on one more person is essentially zero now , he says . The economics of modern surveillance are not beneficial to the consumer .
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因为个人教育投资的边际成本递增，边际收益递减，所以必须采取多种措施刺激个人教育投资的积极性，才能促进我国教育事业的大发展。
Because the marginal cost increases successively as the marginal revenue decreases successively , many measures should be taken to stimulate personal educational investment so as to promote the development of our educational cause .