rotting

例句：

1. 1.The old tree is rotting away at the roots.
   这棵老树正在根部腐烂。
2. 2.The food in the fridge has started to rot.
   冰箱里的食品开始腐烂了。
3. 3. The old books are rotting away in the attic.
   旧书在阁楼里开始腐烂了。