China put an astronaut into space in two thousand three, and it plans to send a robotic explorer to the moon two years from now.

VOA: special.2010.04.28

So what that means is that's how much energy we would have to put into a hydrogen molecule in order to get it to split apart into its two atoms.

它的意义,就是我们需要向一个氢分子中注入这么大的能量,才能将它分解成两个独立的原子。

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