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Theory
Example
Scientists proposed a new theory to explain the origins of the universe.
科学家们提出了一个新的理论来解释宇宙的起源。
Her theory about climate change challenges the traditional scientific consensus.
她关于气候变化的理论挑战了传统的科学共识。
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理论, 假设
a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena
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理论, 假设
an idea, opinion, or belief that one perceives to be true, although it remains to be proved