translation.en: And you'll see that the human, chimp and bonobo all have external testicles, which in our book we equate to a special fridge you have in the garage just for beer.
translation.zh: 你还可以发现， 人类、黑猩猩和倭黑猩猩 都有外显的睾丸， 在我们的书中，我们把这类比成 你在车库里专门放啤酒的特殊冰箱