每个人对每种营养成分都有一种生理上的需要。
Every individual has a physiological requirement for each nutrient.
虽然会产生强烈的化学效应，但与你相比，狮子有更高的生理上的需要。
There is plenty of chemistry, however the Lion is more physical in nature then you are.
还有少数人贪吃他们自己的干鼻屎，是因为味道好吃，还是生理上的需要，请你看看本文讲了些什么？本系列已全部结束。
But even if numbers are lower than experience suggests, this still begs the question of why anybody should choose to eat their own snot.
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