a waste-disposal unit的用法和样例：
- a waste disposal unit
- A waste disposal facility for industrial or special waste.
- Between meals, bile is stored in the gall bladder. Bile further serves as a waste disposal system for toxins removed from the blood by the liver.
- Waste disposal is a nationwide problem.
- It's only a waste of time to speak to her.
- It's a waste of money betting on that old nag!