形容词
中文翻译：理论的
同义词：
['theoretical', 'theoretically']
例句：
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1.The theory of relativity was proposed by Albert Einstein.
爱因斯坦提出了相对论的理论。
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2. The study of the theory of relativity is still ongoing.
对相对论的研究仍在进行中。
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3. The theory of evolution suggests that all living organisms have descended from a commonancestor.
进化论认为所有现存生物都有一个共同的祖先。