And the atoms themselves are quite violent, but if you fire lasers that are precisely tuned to the right frequency, an atom will briefly absorb those photons and tend to slow down.
原子本身的运动很剧烈， 但是如果把调到正确频率的激光射入瓶中， 原子就会慢慢地吸收这些光子 原子的运动就会变慢。