书接上回，第一章讲了身体是怎么把体重维持在恒定范围的，这章开始讲这个范围是怎么来的 
TWO: The Sacred Cow: How Genetics, Epigenetics and Food Control Our Weight Set-Point

I knew that it would have been very well fed by its owner, who had placed colourful garlands around its neck, but despite this it seemed slim and wiry compared to the cattle that I was used to seeing in the drizzly green fields of England. 

印度圣牛比养殖场的牛瘦，应该也是生物学基础， 
一是食...