the Main Heading (H1 or H2)

主标题 (H1 或者 H2)

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This is the energy level diagram of H2.

这是H2的能级图。

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H2 viruses may also pose a pandemic threat.

H 2病毒也可能造成大流行的威胁。

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That is going to equal the energy of the electrons in H2 minus the energies of the electrons in H.

这等于H2分子的能量2,减去H原子中电子的能量。

麻省理工公开课 - 固态化学导论课程节选

For example, H2, N2, they are going to share the electrons uniformly, equally.

比方说，氢气，氮气，他们都无差别的，完全等价地共享电子。

麻省理工公开课 - 固态化学导论课程节选

H2 So the simplest case we can think of is with h 2 where we have two unpaired electrons, each in a 1 s orbital of a separate h atom.

最容易想到的例子是2,我们有两个未配对电子，每个都在一个分开的1s轨道上。

麻省理工公开课 - 化学原理课程节选

No telling whether customer input can reverse the decline in Hummer H2 sales, which, says J.

FORBES: Have It Your Way

Between 1730 and 1759, he produced a series of timekeepers, H1, H2 and H3.

BBC: Longitude clock comes alive

Competing with him were other vintage racers and, at FORBES' request, a 2003 Hummer H2.

FORBES: Magazine Article