Nuclear experts say that radiation from the core of a reactor can split water molecules in two, releasing hydrogen.

原子能专家说，核反应堆堆芯的放射线能够把水分子一分为二从而产生氢气。

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As we said, these hydrothermal vents are releasing into the ocean depth this intensely hot water that contains a chemical called hydrogen sulfide, and also a gas, carbon dioxide.

正如我们所说，这些热液喷口正在向海洋深处释放这种强热的水，含有一种叫做硫化氢的化学物质，和一种气体，二氧化碳。

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This occurs hundreds of billions of times every second in the core of stars like our sun, as hydrogen is converted into heavier elements like helium, releasing huge amounts of energy in the process.

在像太阳这样的恒心的内核里，这个过程每秒会发生上千亿次。在反应过程中氢原子转变成氦原子之类的更重的元素，并释放出巨大的能量。

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Unlike a conventional hot air balloon where the height is controlled by a burner, the gas balloons are filled with hydrogen and controlled by releasing gas to go down and throwing out ballast to go up.

BBC: Wiltshire