比如内华达同亚利桑那州有个蓄水合作关系，亚利桑那把过剩的水储存在含水层，这样内华达州在急需时就能使用。
Nevada and Arizona, for example, have a water-banking partnership, whereby Arizona stores excess water in its aquifers so that Nevada could use it in a pinch.
当系统中存在过剩电力，可以利用泵送水电系统将水抽到高位水库中。
When excess electricity is present in a system, it can be used to pump water up to a reservoir.
由于直接接触大气中的过剩二氧化碳源，海洋表面的水是首先表现出酸化效应的。
Closest to the atmospheric source of excess carbon dioxide, the ocean's surface waters are the first to show the effects of acidification.
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