A theory should be internally consistent.
一套理论应当内在一致。
It was a theory unsupported by evidence.
这是一条没有证据支持的理论。
It's only a theory, admittedly, but the pieces fit together.
得承认这只是一种理论，但其各部分自成一体。
At the moment it is only a theory.
眼下，它还只是个理论而已。
For whales, there is a theory on how sonar can kill.
对于鲸鱼来说，有一种关于声纳如何杀死它们的理论。
You have to prioritise, so indicate the main problems, and then you analyse each one by connecting it with a theory .
你必须分清轻重缓急，所以要指出主要的问题，然后通过与理论的联系分析每一个问题。
He has a theory of love that argues that it's made up of three components: intimacy, passion, and commitment, or what is sometimes called decision commitment.
他有一个关于爱的理论，认为它由三个部分组成：亲密、激情和承诺，或有时称为决策承诺。
There was a theory that he wanted to marry her.
有种观点认为他想娶她。
He urged the revival of the slave-trade in the late 1850s, and he developed a theory of what he called warranteeism.
他在19世纪50年代后期力促奴隶贸易的复兴，并提出了一种他称之为担保主义的理论。
Here, the evolutionary theory must defer to a theory based on an explicit developmental mechanism that can favor either right or left-handedness.
在这里，进化理论必须遵从一种基于明确的发展机制的理论，这种机制可以支持右撇子或左撇子的现象。
Here, the evolutionary theory must defer to a theory based on an explicit developmental mechanism that can favor either right-handedness or left-handedness.
在这里，进化理论必须遵从一种基于明确的发展机制的理论，这种机制既可以支持右撇子，也可以支持左撇子。
Here, the evolutionary theory must defer to a theory based on an explicit developmental mechanism that can favor either right-or left-handedness.
在这里，进化理论必须遵从一种基于明确的发展机制的理论，这种机制可以支持右撇子或左撇子。
Plausible as this seems, it is still a theory and based on our more comprehensive knowledge of land-based animals.
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。
Beats-and-Binding Phonology, a theory incorporated in suprasegmental phonology, is closely related to phonotactics.
强拍与约束音系学是建立在超音段音系学基础上的理论，与语音配列的关系十分密切。
Essentially, a theory is an abstract, symbolicrepresentation of what is conceived to be reality.
理论在本质上是对认识了的现实的一种抽象和符号化的表达。
In other words, you need a theory of value.
换句话说，你需要知道价值评估的理论。
不是一种理论。
A theory differs from a hypothesis in its scope.
理论，其适用的范围与“假设”不同。
‘Error catastrophe’ ‘or extinction mutagenesis’ is a theory about mutations and survival of populations.
“错误突变”，“或阻止突变”是一个关于种群的突变和生存的理论。
To paraphrase Einstein, a theory should be as simple as possible, but not simpler.
爱因斯坦的话换个说法，理论应该尽可能简洁，而不是比较简单。
Similar difficult questions arise within a theory of "vicarious" infringement.
同样困难的问题也产生于代理侵权的理论。
"This is a theory," he emphasizes.
“这只是一种理论，”罗津强调说。
Mere lack of evidence, of course, is no reason to denounce a theory.
当然，仅仅是缺乏证据不是反对一个理论的根据。
Yes, evolution is a theory, but a theory supported by an enormous body of evidence.
是的，进化论虽是一个理论，可是这个理论已为大量的证据所证实。
What's more, they proposed a theory as to what these ripples might be.
并且，他们推测出一个关于这些痕迹应该是什么的理论。
There are two ways you could reject a theory.
你可以在两种情况下拒绝接受一个理论。
Evolution is only a theory. It is not a fact or a scientific law.
进化论只是一种理论，既不是事实，也不是科学规律。
But there's a different problem a theory could have.
但一个理论还可能会存在其他方面的问题。
The antidepressant theory is just that — a theory.
抗抑郁剂理论只是一个理论。
The antidepressant theory is just that — a theory.
抗抑郁剂理论只是一个理论。
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