theory

• 对某事物的系统性解释或一套观点，通常基于证据和推理，用于解释现象并作出预测。也指未经证实的猜测或假设。

A noun referring to a formal idea or set of ideas that explains something, often supported by evidence and used to make predictions.

1. System of ideasB1formal

   A formal set of principles or ideas that explains facts or phenomena.

   思想体系

   • Einstein's theory of relativity changed physics.
   • The theory explains how climate change affects oceans.
   • Scientists tested the theory through experiments.

   同义词doctrineframeworkideologymodelphilosophysystem

   反义词factpracticereality

2. Unproven ideaA2informal

   An idea or opinion that is not yet proven or supported by evidence.

   未经证实的想法

   • That's just a theory; we need proof.
   • My theory is that he forgot the meeting.
   • She has a theory about why the team lost.

   同义词conjectureguesshunchhypothesisnotionpostulatespeculationsupposition

   反义词certaintyfact

3. Scientific explanationB2formalscientific

   A well-substantiated explanation of some aspect of the natural world.

   科学解释

   • The theory of evolution is widely accepted.
   • Quantum theory revolutionized our understanding of matter.
   • Darwin's theory was based on extensive observations.

   同义词accountexplanationframeworkmodelsystem