It was also assumed that the heat of this impact would have caused any water, or its constituent elements, to boil off into space, leaving the baby moon high and dry.

还有一种假设：这种撞击产生的热能导致水(月球的组成元素)汽化后进入太空，留下干燥的月球高高悬挂在天上。

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Water vapor is a normal constituent of the atmosphere.

水蒸气是大气的正常组成部分。

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Hydrogen and oxygen are the constituent parts of water.

氢和氧是构成水的元素。

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They allege that the company's drilling polluted their water with chemicals,metals and methane, the main constituent of natural gas, causing explosions as well as gastrointestinal and neurological illness.

VOA: standard.2010.01.02

With that stroke of his pen, Governor Perry made Texas the first state in the country to require by statute the well-by-well public disclosure of all the constituent chemicals, compounds and water volume contained in frac fluids.

FORBES: Why the Texas Disclosure Law Really Does Work