translation.en: Well, typically, in mammals there is a relationship between body size, metabolic rate, and how long you can live for, and you can predict how long a mammal can live for given its body size.
translation.zh: 通常，哺乳动物中 体型大小，代谢率 和存活寿命有关系， 你可以通过哺乳动物的体型来预测它的寿命。