Theoretical psychology includes two aspects: metatheory and substantive theory.

理论心理学包含两方面：元理论和实体理论。

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Later, I developed a broader theory of what separates the two general classes of learners—helpless versus mastery-oriented.

后来，我提出了一个更广泛的理论来区分这两类常见的学习者——无助型和掌控型。

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The best study of this theory is a quiz show study, where two people are brought in to flip a coin.

这个理论的最佳研究就是一个问答节目研究，找来两个人来抛硬币。

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In nineteen eighty-two, American researchers James Wilson and George Kelling wrote a report describing what they called the broken windows theory.

VOA: special.2009.03.03

There's plainly a tendency in modern literary theory to reduce all the tropes of rhetoric to just these two terms.

在现代文学理论中有一个很明显的趋势,那就是减少一切华丽的辞藻，只保留这两个。

耶鲁公开课 - 文学理论导论课程节选

So, according to the expectations theory augmented with liquidity preference-- This strongly upward-sloping term structure in 2003 would reflect two things.

所以,根据结合了流动性偏好的,预期理论,2003年期限结构中表现出的,强烈上扬趋势反映了两方面的因素

耶鲁公开课 - 金融市场课程节选

Our readers well know, that the two in theory should be the same.

FORBES: GDP And The iPhone Problem

There is also longer-term evidence to support Dr Elsner's theory of two stable hurricane patterns.

ECONOMIST: Eye on the storm | The

The Biderman Market Theory has two key distinctions and both of them are bullish for U.S. stocks over the near term.

FORBES: Two Reasons To Be Bullish