我们不得不更换地板，因为潮湿导致了严重的干腐病。

We had to replace the floorboards because of severe ___dry-rot caused by dampness.

如果不进行改革，这个机构的官僚作风会导致内部逐渐腐朽。

Without reforms, the bureaucracy in this institution will lead to internal ___dry-rot.