a waste of waters

例句：

1. 1. The rainwaterin the garden is a waste of water.
   花园里的雨水是浪费的水。
2. 2. The factory's waste disposal system is a greatexample of environmental protection.
   工厂的废物处理系统是环境保护的一个很好的例子。
3. 3. We shouldnot waste water when we are washing ourhands.
   我们在洗手时不应该浪费水。