fruitlet core rot

例句：

1. 1. The old tree has begun to rot at the roots.
   这棵老树开始在根部腐烂了。
2. 2. The food in the fridge is starting to rot.
   冰箱里的食物开始腐烂了。
3. 3. The old books are rotting away in the attic.
   旧书正在阁楼中腐烂。