单词	群速度
释义	群速度医Group velocity
随便看	ancient style prose ancient-style prose ancient style prose translation ancient submarine black smoker chimney ancient suite ancient.sunspot observation ancient sweater ancient taboo ancient tao ancient tcm books ancient teacher ancient teaching ancient tea garden ancient tea tree ancient tea trees ceno species ancient technique Ancient techniques of needling ancient teeth ancient temple ancient temples Ancient Tennoism ancient term for secretary of state Ancient terrain ancient text ancient textile