牛奶的科学 – 乔纳森·J. 奥沙利文

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The milk industry produces in excess of 840 million tons of products each year. Why do humans drink so much milk? And given that all mammals lactate, why do we favor certain types of milk over others? 乔纳森·J. O’Sullivan describes how milk is made.

Lesson by Jonathan J. 奥沙利文, TED-Ed的动画.