crumbling

例句：

1. 1. The old building was crumbling down due to age.
   由于年久失修，那座老建筑正在崩塌。
2. 2.The economy is crumbling due to the pandemic.
   由于疫情的影响，经济正在崩溃。
3. 3.The foundation of the house was crumbling, and it needed to be repaired immediately.
   房子的地基正在崩塌，需要立即修复。