霉病

例句：

1. 1. The bread was left out on the counter for too long and developed a mold.
   面包放在柜台上太久，长出了霉菌。
2. 2. The old books were covered in mold due to dampness.
   旧书因潮湿而长满了霉。
3. 3. The moldy smell from the basement made it hard for us to breathe.
   地下室发霉的气味让我们难以呼吸。