Part of the answer is probably that not all the negative consequences would have shown up at the time the mechanism was evolving. Obesity, for example, is rare in a state of nature.

部分原因可能是，这样消极的影响在人类机体进化时期并没有显示出来：比如说，肥胖症在原始时代是很罕见的。

youdao

Part of the answer is probably that not all the negative consequences would have shown up at the time the mechanism was evolving. Obesity, for example, is rare in a state of nature.

部分原因可能是，这样消极的影响在人类机体进化时期并没有显示出来：比如说，肥胖症在原始时代是很罕见的。

youdao