water softened and purified

例句：

1. 1. The river flows through the city, providing clean water for the people.
   这条河流经城市，为人们提供清洁的水源。
2. 2. Water is essential for life on Earth.
   水是地球上生命所必需的。
3. 3. We need to conserve water and reduce waste.
   我们需要节约用水并减少浪费。