translation.en: And the next time it sees a new face, it essentially learns that this face has the same characteristics of a smile, and it says, "Aha, I recognize this. This is a smile expression."
translation.zh: 然后下一次当它看到一个新面孔时， 它就基本上能知道 这张面孔上有和微笑相同的特性， 然后它就会说：“啊哈，我知道了，这是一个微笑的表情。”