You're taking advantage of a promoter system, or a gene activation system, that this species knows about because adult animals can make milk.

我们之所以能利用这个启动子系统,或者称之为可以被这一物种识别的,基因活化系统,是因为成年动物可以泌乳

耶鲁公开课 - 生物医学工程探索课程节选

Then we got into more deliberate hunting of animals, larger species were hunted and then you started to see humans eating things like mammoth, deer, horse, bison, and reindeer.

我们开始有意识地狩猎捕食,我们开始捕杀巨大的物种,于是你能发现人类食用大型动物,比如猛犸象,鹿,马,野牛及驯鹿

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Several large animal species had disappeared so people had to find other animals and so this changed from going to find animals to domesticating animals, and shift from collection of plants to production of plants.

很多大型动物物种已经灭绝了,人类不得不去寻找其他动物,因此这也就完成了从狩猎到驯养的转变,从采集到种植的飞跃

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选