translation.en: He didn't mention the speed. Your eye is constantly in motion, moving around, looking at eyes, noses, elbows, looking at interesting things in the world.
translation.zh: 他没有提到速度。你的眼睛一直在运动， 四处运动，看着眼睛、鼻子、手肘， 看着这世上有趣的东西。