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词汇 theory
释义 theory
noun[ C or U ]
uk /ˈθɪə.ri/ us /ˈθɪr.i/
B2
a formal statement of the rules on which a subject of study is based or of ideas that are suggested to explain a fact or event or, more generally, an opinion or explanation: 理论;学说;意见
economic theory经济理论
scientific theory科学理论
theory ofDarwin's theory of evolution达尔文的进化论
have a theory thatHe has a theory that the hole was caused by a meteorite.他认为那个洞是陨石坠落形成的。
Thesaurus: synonyms, antonyms, and examples

an idea
ideaI've got an idea - why don't we ask John for help?
planThe plan is to hire a car when we get there.
thoughtHave you had any thoughts on presents for your mother?
suggestionHave you got any suggestions for improvements?
brainwaveUKI wasn't sure what to do and then I had brainwave - I could ask Anna for help.
brainstormUSShe was stuck until she had a brainstorm and the solution came to her.
 in theory
B2
If something is possible in theory, it should be possible, but often it does not happen in that way: 理论上,从理论上讲
In theory, the journey should take three hours, but in practice it usually takes four because of roadworks.按理说行程应该只要3小时,但由于道路施工,实际上通常会需要4小时。
It was Ptolemy who propounded the theory that the earth was at the centre of the universe.是托勒密提出了地球位于宇宙中心的理论。
This new evidence lends support to the theory that she was murdered.这一新证据证明了她是被谋杀的说法。
This research seems to give some validity to the theory that the drug might cause cancer.
In Jungian theory, there are certain archetypes of human personality.根据荣格理论,人格存在一些特定原型。
In theory, women can still have children at the age of 50.理论上说,妇女到了50岁仍可以生育。
SMART Vocabulary: related words and phrases

Philosophy
aesthete
aesthetic
aesthetically
anthropocentric
anthropocentrism
epistemologically
epistemology
essentialism
existential
existentialism
nihilistic
non-deterministic
non-philosophical
notional
ontological
spatio-temporal
spatiotemporally
superorganic
supersensible
syllogism

You can also find related words, phrases, and synonyms in the topics:


Ideas, concepts and theories

theory | American Dictionary


theory
noun[ C/U ]
us/ˈθɪər·i, ˈθi·ə·ri/
something suggested as a reasonable explanation for facts, a condition, or an event, esp. a systematic or scientific explanation:
[ U ]Adele took a course in modern political theory.
[ C ]I have a theory (= an opinion) about why everybody in the city is in such a hurry.

Idiom


in theory

theory | Business English


theory
noun
uk /ˈθɪəri/uspluraltheories
[ C or U ]
a formal statement of ideas that are suggested to explain a fact or event, or how something works:
He has four theories to explain organizational change and development.
economic/political theoryEconomic theory says that there is little connection between the euro's value against the dollar or the yen and the success of monetary union itself.
a theory of sthIn this article the authors develop a theory of high-performing organizations.
[ C or U ]
a formal statement of the rules or principles on which an activity or a subject of study is based:
management/organization theoryThis case study has important implications for management theory
the theory and practice of running a department
[ C ]
a statement of an opinion or an explanation of an idea that is believed to be true, but might be wrong:
The theory is that staff react better to praise than to criticism.
People will buy the product if you put it in the right place - well, that's the theory anyway.
 in theory
if something is possible in theory, it should be possible, but often it does not happen in that way:
In theory, you can be up and trading in a just a day.
Employing fewer people sounds great in theory, but how's it going to work out in practice?

See also


content theory
economic theory
expectancy theory
Elliott wave theory
employment theory
game theory
Herzberg's two-factor theory
monetary theory
organizational theory
price theory
View all

queuing theory

Examples of theory


theory
Does the autistic child have a "theory of mind"?
It is theory tested by many individual research findings that permits the generation of predictions about program outcomes under different conditions.
In theory, village development plans flow up through district and regional development committees to the central government.
Ethnographic theories are situated inbetween qualitative categories and narrative satisfaction.
All of this is ordinary in the realm of current knowledge-based system theory and can be found, in many variations, in the literature.
The psychological theory is based on the philosophical premises.
From being purely historical and documentary, they are now turning towards an interest in theory.
But it would prove impossible to deduce a physical theory from such purely formal theorems.
But the idea of an ageless self is also supported by developmental psychological theories, where the development after adolescence is seldom considered.
Page also correctly notes that localist representations not only can yield insightful and interpretable psychological theories, but neurally plausible theories as well.
We do not understand the notion of a "psychological" theory that is "nonindividualistic"; the individual organism is psychology's focal level of analysis.
Using reflective practice to link personal and public theories.
Distributed representations of structure : a theory of analogical access and mapping.
In this commentary we raise two issues that we think are directly related to the theory's treatment of mental representations as emulations.
In category theory, non-determinism and probability are represented by suitable monads.
See all examples of theory
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.

Collocations withtheory


theory

These are words often used in combination with theory.

Click on a collocation to see more examples of it.


abstract theory
Incompressible dynamics provide an interesting test of the abstract theory.
accepted theory
Perhaps for this reason, no generally acceptedtheory has emerged.
alternate theory
In the alternate theory, the changes in the representation are compensated for by corresponding changes in the process.
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.
See all collocations with theory
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