工人们用灰浆把石头粘合在一起，建造了一堵坚固的墙。

The workers used ___mortars to bond the stones together and built a solid wall.

士兵们用迫击炮向山上的敌人阵地开火。

The soldiers fired their ___mortars at the enemy positions on the hill.

药剂师用研钵和杵将药片碾成粉末。

The pharmacist crushed the tablets into powder using ___mortar and pestle.