对这种损害是由于自由基：不稳定分子时创建的身体使用氧气。

Much of this damage is caused by free radicals: unstable molecules created when the body USES oxygen.

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研究者知道被称为自由基的不稳定分子能破坏你的细胞dna，增加得癌症的概率。

Researchers know that unstable molecules called free radicals can damage your cells' DNA, upping the risk of cancer.

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不稳定的秋叶叶绿素分子吸收的能量，不会像在完好的夏叶中吸收的能量那样立即传输到有用的产品和工艺流程中去。

The energy absorbed by the chlorophyll molecules of the unstable autumn leaf is not immediately channelled into useful products and processes, as it would be in an intact summer leaf.

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And there's actually a way that we can make predictions here, and what I'll tell you is molecular orbital theory predicts that h e 2 does not exist because it's not stabilized in terms of forming the molecule.

其实我们有一种办法可以做出预测，我要告诉你们的是分子轨道,理论预测He2不存在,因为它形成分子不稳定。

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