a moldy smell的用法和样例：
- We had a moldy holiday - it rained every day.
- We are sorry to inform you that the goods arrive in a moldy condition.
- A bad smell emanated from the dead dog by the road.
- Faulty corks can cause a moldy or wet cardboard aroma, while a sour milk aroma is due to another spoilage organism called lactobacillus.