translation.en: He used the example of a common grazing area in which each person by simply maximizing their own flock led to overgrazing and the depletion of the resource.
translation.zh: 他例举某个共用畜牧的土地为例，在那里， 每个人只是简单的将他们畜牧的牛羊增加到最大值， 就会导致过度畜牧，资源耗尽。