a tiny speck of dust的用法和样例：
- A soft breeze sends a tiny speck of dust flying through the air.
- A single speck of dust can damage a tiny transistor.
- I've got a speck of dust in my eye.
- Glimpsing a tiny speck of daylight, Yuncui vowed to work herself free.
- There's not a speck of dust in their house.