指挥官紧急调派了增援部队以抵御敌军的进攻。

The commander urgently deployed ___reinforcements to defend against the enemy's attack.

工人们用钢筋加固了这座老房子的墙壁。

Workers used steel bars as ___reinforcements for the old house's walls.

老师用糖果作为强化物来鼓励孩子们完成作业。

The teacher used candy as ___reinforcement to encourage the children to finish their homework.