A Niagara of yellow sand的用法和样例：
- And everyone knows that the north part is one long stretch of yellow sand.
- The territory of yellow sand, iron ore, quartz rock, vermiculite, and other rich mineral reserves.
- This is still a vast land of yellow sand, without a blade of grass growing on it.
- I'd like to congratulate the previous speakers on what can only be called a Niagara of words and a Sahara of thought.