But if you buy the Waterson 2000 water filtration system...

但如果你购买华特生2000滤水器。

Parts of the reef even act as natural water filtration systems.

部分珊瑚礁甚至充当天然水过滤系统。

For example, solar cells, prosthetics, water filtration systems, GPS, wireless communication devices, even the lens on your camera phone.

例如，太阳能电池、假肢、水过滤系统、GPS、无线通信设备，甚至是照相手机上的镜头。

Building an innovative water filtration system could provide a solution for farmers working in drought-stricken regions, or a way to clean municipal water in polluted cities.

建立创新的水过滤系统可以为在干旱地区工作的农民提供解决方案，或者为污染城市的市政用水提供清洁方法。

He instructed the villagers to gather certain minerals and plants found in the surrounding area, which he then used to create a makeshift water filtration system.

他指示村民们收集在周边地区发现的某些矿物质和植物，然后他用它们来建造一个临时的水过滤系统。