mold

例句：

1. 1. The old wooden door has a mold on it.
   那扇旧木门上长了霉。
2. 2. The mold in the bread was so bad that it made the bread taste bad.
   面包里的霉菌太严重了，让面包尝起来很糟糕。
3. 3. The mold grew on the wall because of the dampness.
   墙上的霉菌是因为潮湿而生长的。