在分子轨道理论中，我们基于轨道的对称性给它们命名。

In molecular orbital theory, we named orbits based on their symmetry.

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医生把胡萝卜的种子和根入药，是基于“良药苦口”这个理论的。

Doctors used carrot seeds and roots as medicine, on the theory that foods that taste bad must be good for you.

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这似乎是合理的，但它仍然是一种理论，这个理论是基于我们对陆生动物的更全面的认识。

Plausible as this seems, it is still a theory and based on our more comprehensive knowledge of land-based animals.

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So in molecular orbital theory, what we did was we named orbitals based on their symmetry.

在分子轨道理论中，我们基于轨道的对称性给它们命名。

麻省理工公开课 - 化学原理课程节选

So, molecular orbital theory, on the other hand, is based on quantum mechanics.

另一方面分子轨道理论，是基于量子力学的。

麻省理工公开课 - 化学原理课程节选

Insurance relies on this theory of risk pooling but it has to make it work.

保险是基于风险汇聚理论的,并运用其有效降低风险

耶鲁公开课 - 金融市场课程节选