rotting of plant and animal material

例句：

1. 1. The old books are rotting awayin the attic.
   旧书在阁楼里开始腐烂了。
2. 2. The food was rotting on the shelves before it was thrownout.
   食物在架子上开始腐烂，然后被扔掉了。
3. 3. The mold was rotting the wood, making it unstable.
   霉菌正在腐蚀木头，使它变得不稳定。