Word: depth
Athena Chu: Zong Shen
Explanation:
1. The vertical depth of the military operation area.
2. The longitudinal length or depth used in other areas.
Basic explanation:
The vertical depth of the combat area.
develop in depth
Explain in detail:
1. The vertical depth of the military operation area.
Biography 5 of Liu's combat hero: "The first battalion broke through, and the second battalion immediately developed in depth."
2. The longitudinal length or depth used in other areas.
Roaming in Wutai Mountain by Hou Jinjing: "The farming area here is called Dongjiatai, which is 35 miles deep and governs five villages with a population of just over 500."