translation.en: So to explain that -- if you've got an elementary particle and you shine a light on it, then the photon of light has momentum, which knocks the particle, so you don't know where it was before you looked at it.
translation.zh: 所以为了解释它--如果有一个基本粒子， 你将一束光照向它， 那么这束光的光子就有动量， 就会敲击这个粒子， 所以你不知道在你看到它之前它在什么位置。