这种新系统可以用于水体检测和净化系统。
Such a system could work in concert with water purification and testing systems.
因此，这里有5个原因你应该使用一个冒号净化系统。
So, here are 5 reasons why you should use a colon cleanse system.
你真的要相信你的城市的水净化系统？
Do you really want to trust your city's water purification system?
空气净化系统不能做什么？
空气净化系统不能做什么？
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