This is the energy level diagram of H2.

这是H2的能级图。

youdao

The question now is, is H2 stable or will it not form?

现在的问题是，H2稳定吗，它到底会不会形成？

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That means people must use energy to make H2 first.

这就意味着人们必须先用能量制造氢气才可以。

youdao

That means people must use energy to make H2 first.

这就意味着人们必须先用能量制造氢气才可以。

youdao