translation.en: Oh, and anyone who has both a child and a house pet has surely noticed that the child, exposed to speech, will acquire a human language, whereas the house pet won't, presumably because of some innate different between them.
translation.zh: 噢，任何人要是既有孩子 又有宠物， 一定会注意到，接触到言语的儿童 会习得人类语言， 而宠物则不会， 想必是由于他们之间有些先天的差异。