关于商品价值的几个规律

单位商品边际效用必定随着该商品的增多而递减，因而其交换价值必定随着该商品的增多而递减。因为交换价值实体是使用价值，说到底，是商品边际效用，亦即商品最后单位增量对人的使用、消费需要的效用。这样一来，商品越多，人的需要和欲望得到满足便越多，而没有得到满足的需要和欲望--亦即剩余的需要和欲望--便越少且越不重要，最后的单位增量所能够满足的需要和欲望也就最少且最不重要，商品的边际效用也就最小，单位商品的使用价值也就越小，单位商品的交换价值实体也就越小，因而单位商品的交换价值也就越小。

Some Rules on Commodity Value

The marginal utility of average commodity degreases with the increase of this commodity,so does its exchange value,for the entity of the exchange value is the value in use,in other words,the marginal utility of commodity.The more the commodities are,the more people need and desire for,and so the unsatisfied needs and desires become fewer and less important,finally leading to the least important needs and desires caused by average increase,least marginal utility,least value in use,least entity of exchange value,and least exchange value of average commodity.