a water purification plant的用法和样例：
- A neural network control system for the optimum coagulant dose rate in a water purification plant
- The Biotope converts the remains of an old water purification plant in an ecological mixed use development.
- Baptism is a water purification ritual practiced by all Christians.
- A plant engineer who is in charge of both water supply and wastewater treatment will probably put more effort and concern into the operation of the water purification plant.