translation.en: And we're not all going to become facial expression experts overnight here, but there's one I can teach you that's very dangerous and it's easy to learn, and that's the expression of contempt.
translation.zh: 我们不可能一夜之间成为表情专家 我下面教你们辨识一个非常危险的表情 这也很容易学会 那就是轻蔑的表情 假设两个人势均力敌地竞争