And given that it takes three times as much grain -- actually ten times as much grain -- to feed a human if it's passed through an animal first, that's not a very efficient way of feeding us.
虽然说需要3倍的粮食 事实上却是10倍的食物 来喂养一个人，如果从喂养动物的粮食也计算在内 这并不是一个很有效率的喂养方式