形容词
中文翻译：Unknown
同义词：
['theoretical', 'theoretically']
例句：
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1. The theory of relativity has revolutionized our understanding of space and time.
相对论理论已经彻底改变了我们对空间和时间的理解。
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2. The project was based on the theoretical principles of sustainable development.
该项目基于可持续开发的理论原则。
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3. The scientist used the theory to explain the phenomenon.
科学家用这个理论来解释这一现象。