1
theory of ...
表示某种学说或理论时常用此结构
the theory of relativity
相对论
理论；学说
先理解核心含义，再看它在真实句子里的用法。
理论；学说
A set of ideas or a systematic explanation intended to describe or account for something, especially one based on general principles.
the theory of relativity
相对论
被认为准确描述事件或系统的说明
A description of an event or system that is considered to be accurate.
对自然界某方面的充分证实的解释；在多种情况下适用的公认知识体系,用于解释特定现象集
a well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena
解释观察现象并正确预测新现象的系统性观念；经观察、实验证实的假设
A coherent statement or set of ideas that explains observed facts or phenomena and correctly predicts new facts or phenomena not previously observed, or which sets out the laws and principles of something known or observed; a hypothesis confirmed by observation, experiment etc.
对自然界的初步见解；尚未验证但若为真则可解释某些事实或现象的概念
a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena
The teacher explained the theory of gravity to the class.
老师向全班解释了万有引力理论。
AI contextual example
My friend has a theory about why the bus is always late.
我的朋友有一个关于公交车为什么总是晚点的猜测。
AI contextual example
The theory explains how the economy grows over time.
这一理论解释了经济如何随时间增长。
AI contextual example
theories can incorporate facts and laws and tested hypotheses
理论可以包含事实、定律和经过检验的假设。
WordNet
表示某种学说或理论时常用此结构
the theory of relativity
相对论
后接同位语从句，说明理论的具体内容
the theory that the Earth is round
地球是圆的理论
用于表示理论上，常与 in practice 相对
In theory, this method saves time.
理论上，这种方法节省时间。
指基于个人思考的推测或想法
She has a theory about the cause of the disease.
她对这个疾病的起因有一套推测。
Not this
According to theory, it works.
Use this
According to the theory, it works.
中文学习者常遗漏冠词，因为中文中没有冠词体系。在英文中，当特指某个已知的理论时，必须使用定冠词'the'。
Not this
I have many theory to learn.
Use this
I have many theories to learn.
中文中'理论'可数但无复数变化，而英语中'theory'的复数形式是'theories'。当表示多个理论时，必须用复数形式。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
科学理论
The scientific theory was supported by extensive evidence.
这一科学理论得到了大量证据的支持。
进化论
Darwin's theory of evolution revolutionized biology.
达尔文的进化论彻底改变了生物学。
经济理论
Keynesian economic theory influenced government policies.
凯恩斯经济理论影响了政府政策。
理论上
In theory, this plan should work, but we need to test it.
理论上，这个计划应该可行，但我们需要测试一下。
政治理论
The course covers major political theories from Plato to Marx.
这门课程涵盖了从柏拉图到马克思的主要政治理论。
弦理论
String theory attempts to unify general relativity and quantum mechanics.
弦理论试图统一广义相对论和量子力学。
理论上
In theory, this plan should work, but we need to test it.
理论上讲，这个计划应该可行，但我们需要测试一下。
钟爱的理论
His pet theory about the economy has been proven wrong.
他关于经济的钟爱理论已被证明是错误的。
工作理论
My working theory is that the problem is caused by a software bug.
我的工作理论是问题由软件漏洞引起。
理论上，理论和实践没有区别。实际上，却有区别。
Einstein's theory of relativity changed our understanding of the universe.
爱因斯坦的相对论改变了我们对宇宙的理解。
理论可以通过实验证实；但没有一条路从实验通往理论的诞生。
The theory of evolution is supported by a vast amount of evidence.
进化论有大量证据支持。
Use theory naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
theory 可拆为 the + ory，联想‘这个理论就像个故事（ory）’。
多用于学术或科学语境，指经过验证的理论体系；在日常对话中也可表示未证实的想法，正式程度随语境变化。
These words share the spelling ending 'ory', but their stressed vowels differ from theory's /iː/. None are perfect rhymes. The final syllables vary: /əri/ vs /ɔːri/, /mɛməri/, /hɪstəri/, /fæktəri/, /vɪktəri/.
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.