Una idea que explica por qué algo sucede.
An idea that explains why something happens.
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See how the word “una teoría” is used in sentences
Los científicos propusieron una teoría sobre cómo empezó la vida. — Scientists proposed a theory about how life began.
Tengo una teoría sobre por qué la máquina sigue parándose. — I have a theory about why the machine keeps stopping.
Eso sigue siendo una teoría hasta que alguien la ponga a prueba. — That stays a theory until somebody tests it.
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