霉菌

例句：

1. 1. The old house had a lot of mold on the walls.
   这所老房子的墙上有很多霉菌。
2. 2. The food was moldy and unsafe to eat.
   食物发霉，不能吃。
3. 3. The mold grew in the damp basement.
   霉菌在潮湿的地下室里生长。