Now, the when we do this kind of arithmetic and mathematics, do we want to factor in one sees all sorts of Numbers about the cost or the value of a human life.
现在，当我们做这样的算术时，我们是否希望包括进来，关于一个人的成本或生命价值的所有因素。
2
In case of changing the single factor, the cost of marginal value should equal to its marginal profit.
在单一要素变动的情况下，边际价值成本应当等于边际价值收益。
3
Firstly this paper tells research category and meanings of cost control and analyses how to control costs by value chain and cost drive factor.