The ratio of hydrogen to oxygen in water is 2 to 1.

1。

You can break apart the hydrogen from the oxygen in water, and then you can reform them to make hydrocarbons.

你可以将氢从水中的氧中分解，然后你可以将它们转化为碳氢化合物。

And this process uses up a lot of the oxygen in water.

这个过程消耗了水中的大量氧气。

At 4 degrees Celsius the solubility of oxygen in water is about double that of what it is at 25 degrees Celsius.

在 4 摄氏度时， 氧气在水中的溶解度大约是 25 摄氏度时的两倍。