弗洛伊德的这些两种本能的理论中心是对立理论。这类理论的一个问题是，它们开始变得静态。

Freud's theory of these two instincts certainly is a theory of opposites. One problem with such theories is that they can become static.

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从该星系中心接收到的无线电信号证实了黑洞理论。

Radio signals received from the galaxy's centre back up the black hole theory.

《柯林斯英汉双解大词典》

最近的发现有力地支持了这样一种理论，即银河系中心，和宇宙中估计存在的1000亿个其他星系中的许多里有一个黑洞。

Recent findings lend strong support to the theory that a black hole lies at the center of the Milky Way and of many of the 100 billion other galaxies estimated to exist in the universe.

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That's what this whole theory is about, how to get a lot of expected return without getting a lot of risk.

整个金融理论的中心,就是如何获得高收益,同时降低风险

耶鲁公开课 - 金融市场课程节选

The exception is Plato, where I'll lecture, maybe two lectures, trying to reconstruct Plato's central arguments, at least the arguments relevant to our class.

例外是柏拉图，我将授课的，也许要两节课，我会重新构建柏拉图中心理论，至少这部分理论是和我们的课相关的。

耶鲁公开课 - 死亡课程节选

If you look at John Geanakoplos's course on Financial Theory, his mathematical concepts are central to his outline of the course; but this being a Financial Markets course, I'm dividing it up more in terms of markets and institutions.

如果你们听约翰·吉纳科普洛斯的,金融理论课,他的大纲中心部分,是金融学中的数学概念,而我们这是金融市场课,于是我从金融市场和,金融机构的角度来划分这一课

耶鲁公开课 - 金融市场课程节选