translation.en: We've been talking, I guess, about fires and caves and saber-toothed tigers. I don't know what they talked about, but they were doing a lot of talking, and like I said, there's a lot of humans evolving speaking, about 100 billion people in fact.
translation.zh: 人们交谈，我猜想，谈论火，洞穴， 甚至剑齿虎。我不知道他们究竟谈过什么。 但人们谈论了许多，正如我说 人与人的交流在不断地演变。 事实上有大概有一千亿人参与其中。