translation.en: And that's why we can tell the emotion of somebody else -- because their muscles are acting, subconsciously, except that we've evolved to make the facial muscles really rich with emotion.
translation.zh: 我们可以分辨出其他人的情感 因为我们可以看得到他们的肌肉 在活动 尽管只是在潜意识的指挥下 而我们的面部表情又是特别擅长于传情达意