But it is a scientific theory based on repeated observations, experiments,measurements and discoveries.

VOA: special.2009.12.01

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

What finance theory is based on-- and much of economics is based on-- the idea that people want to maximize the expected utility of their wealth.

金融学理论建立在,并且很多经济学的都是建立在,人们希望能使自己对,财富的期望效用最大化这一基础上

耶鲁公开课 - 金融市场课程节选

Whether to gamble, based on efficient-- based on expected utility theory.

例如赌博,你们是注重效率呢,还是注重预期效用

耶鲁公开课 - 金融市场课程节选

But, you know that this is based on theory.

但注意,这个公式是基于概率论的

耶鲁公开课 - 金融市场课程节选