He tossed the chalk into the groove below the blackboard, patted the chalk dust off his hands, and said, "So, digging trenches has become a reasonable method... What is a trench? A trench is a series of such pits."
As he spoke, he picked up a teaching aid previously carved out of wood. It even had some little wooden carved figures that looked very lifelike.
While speaking, Tang Mo picked up the teaching aid and stepped down from the podium. He placed the teaching aid in front of the students for a closer look, "Soldiers hiding in this trench wouldn't have to worry about most of their bodies being exposed under the enemy's gunfire, and their chances of survival would be much higher."
