Definition
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theory
A theory is a well-substantiated explanation of some aspect of the natural world, based on a body of evidence and reasoning.
理论是对自然界某一方面的充分证实的解释,基于一系列证据和推理。
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The theory of evolution explains how species change over time.
进化论解释了物种如何随时间变化。
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Her theory about climate change has gained a lot of support from scientists.
她关于气候变化的理论得到了许多科学家的支持。
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In physics, the theory of relativity revolutionized our understanding of time and space.
在物理学中,相对论理论彻底改变了我们对时间和空间的理解。