risk of mould

例句：

1. 1. Theold wooden floor has developed a mould on it.
   旧木地板已经发霉了。
2. 2. The food was spoiled due tothe mould growth.
   由于霉菌生长，食物已经变质了。
3. 3. Themoldy bread is unsafe to eat.
   发霉的面包不安全可食用。