translation.en: But there's a very simple little kind of calculation of what's required, how much plants are required for the herbivores to live, how many herbivores for the carnivores to eat, etc., that you actually have to balance actively.
translation.zh: 但是这里面也要求一些简单的计算， 比如为了草食动物的存活，需要多少植物， 为了我肉食动物的存活，需要多少草食动物， 你需要实现一个动态的平衡。