好比你这么说:“牛挤出来的是奶,好虽好,但牛要吃草,这不好。吃草造成了社会资源的损失。只有不吃草,但照样挤出奶来,那才好。”但在这个世界上,牛必须吃草,才能挤出奶来。是牛制造了牛奶,尽管它在制造的过程中损耗亍草,因此被人嫌弃为“不够理想”。牛不吃草,就不会有牛奶。 For example, you say: “Although the cows out of the milk, although good, but the cattle to graze, this is not good. Grazing caused the loss of social resources. Only do not eat grass, but still out of milk, that Good. ”But in this world, the cow must graze before it can squeeze milk out. It is the cow that made the milk, and although it lacks grass in the manufacturing process, it was dismissed as “less than ideal ”. Do not eat grass, there will be no milk.