工人们正在拆卸旧桥以便建造新桥。

The workers are ___dismantling the old bridge to build a new one.

环保组织呼吁逐步拆除这座污染严重的工厂。

Environmental groups are calling for ___dismantling the heavily polluting factory step by step.

维修工正在拆卸这台旧空调以便回收零件。

The technician is ___dismantling the old air conditioner for parts recycling.