水以三种状态存在：液体、气体和固体。

Water exists in three states: liquid, gas, and solid.

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因为它通常以金属的状态存在，并且在地球的冷却和固结的过程中，会优先合并到地核中。

Because it usually exists in a metallic state, it was preferentially incorporated in Earth's core as the planet cooled and consolidated.

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一些人建议将二氧化碳储存在煤矿中，或以液体状态储存在海洋中。

Some propose storing the CO2 in coal mines or liquid storage in the ocean.

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