縱ㄗㄨㄥzōng深ㄕㄣshēn

  1. 軍事上指作戰地域的縱向深度。

英depth (from front to rear)​, depth (into a territory)​, span (of time)​, (fig.)​ depth (of deployment, progress, development etc)​
法profondeur
德Tiefe (S)​