At zero intensity, the last glimmer of the light vanishes into the atoms, and the polariton comes to a dead stop. 到了控制光强度归零之时，光的最后一丝光芒都消逝到原子里，极化声子就完全停止了。
As the control beam's intensity ebbs, the remaining signal light is absorbed, and the increasingly atomic polariton slows even more. 一旦控制光的强度逐渐下降，剩馀的讯号光就给吸收了，原子极化愈来愈强的极化声子速度减慢得更多。
