形容词
中文翻译：理论的
同义词：
['theoretical', 'theoretically', 'theoretically例句：1. The theory of relativity was proposed by Albert Einstein.（爱因斯坦提出了相对论理论。）']
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理论。
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2. The research is based on the theoretical model.
这项研究基于理论模型。
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3. The theory has been tested in various experiments.
这个理论已经在各种实验中得到了验证。