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...but unfortunately, many factors have caused a major upset in the flow and use of fresh water and have caused massive crises in many regions of the earth.
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This means if we do nothing in terms of preserving and using water wisely, it is only a matter of time before all regions begin to experience water crises and all the repercussions that come with it.
Never assume that your society is too advanced to experience water shortage.
利用变介质型电容传感器可以用来测量下列哪些物理量（ ）
电容传感器从原理上可以分为（ ）
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