deterioration

几乎没人预料到局势会恶化得如此迅速，以至于紧急措施变得不可避免。

Few anticipated ___so ___rapid ___a ___deterioration ___that emergency measures became unavoidable.

由于缺乏维护，这座老房子的状况开始恶化。

The ___deterioration of the old house's condition is due to lack of maintenance.

由于年久失修，这座老房子的屋顶出现了明显的损坏。

The old house shows visible ___deterioration in its roof due to years of neglect.