计算代谢率完全是靠消耗食物的热量来计算的
食物的热量斗产生在体内

现在讲的只能是基础代谢而没有考虑大象狮子多跑了少跑了的问题

基础代谢！=基础代谢率 but they are proportional by
definition of 率.

If 基础代谢 is 30 times different between two animals then 基础代谢率 is 30 times different between the same two animals