n.(名词)

1. 理论
2. 推测
3. 学说
4. 原理
5. 意见
6. 论说
7. 学理
8. 揣度
9. ...论
10. 看法
11. 原则
12. 见解
13. 假说

n.(名词)

1. [C]学说 a reasonable or scientifically acceptable explanation for a fact or event
2. [U]理论,原理 general principles and knowledge as opposed to practical methods or skills
3. [C]意见,看法 opinion or supposition, not necessarily based on reasoning

Noun:

1. 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;

   "theories can incorporate facts and laws and tested hypotheses"
   "true in fact and theory"
   

2. a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena;

   "a scientific hypothesis that survives experimental testing becomes a scientific theory"
   "he proposed a fresh theory of alkalis that later was accepted in chemical practices"
   

3. a belief that can guide behavior;

   "the architect has a theory that more is less"
   "they killed him on the theory that dead men tell no tales"
   

1.理论;学说
Atheory is a formal idea or set of ideas that is intended to explain something.

theory在线翻译

e.g. Marx produced a newtheory about historical change based upon conflict between competing groups...
马克思创立了一种新理论，认为历史的演变是基于对立集团之间的冲突之上的。
e.g. Einstein formulated thetheory of Relativity in 1905.
爱因斯坦于 1905 年创立了相对论。

2.观点;见解
If you have atheory about something, you have your own opinion about it which you cannot prove but which you think is true.

theory

e.g. There was atheory that he wanted to marry her...
有人认为他想娶她。
e.g. Mytheory about divorce is that it's not the split-up that damages children, it's how it is handled.
我对离婚的看法是，伤害孩子的不是婚姻的破裂，而是处理离婚的方式。

3.(实践科目、技能的)理论基础
Thetheory of a practical subject or skill is the set of rules and principles that form the basis of it.

theory的反义词

e.g. He taught us musictheory.
他教我们乐理。
e.g. ...graduates who are well-trained in both thetheory and practice of statistics.
在统计学理论和实践两方面都训练有素的毕业生

4.从理论上说;照理说
You usein theory to say that although something is supposed to be true or to happen in the way stated, it may not in fact be true or happen in that way.

e.g. A school dental service exists intheory, but in practice, there are few dentists to work in them.
照理说，学校也有牙医诊所，可实际上，里面的牙医寥寥无几。

1. 理论：在1960年代,当我刚涉足我们的书名简单称之为""理论""(theory)的东西时,这一术语(如此怪异,它是关于什么的理论)的含义比今天宽泛得多. 在结构主义风行的时期,出现了大量不断扩展的理论--从根本上看,

2. 看法：第一、锻炼了我的胆量,以前每到公众面前露次一脸,发表下看法(theory),脸红的像猴子,胆小的如老鼠,心好比是一个空漏斗,这次相对以前进(progress)步多了;第二、通过自主的学习,学会了一项技能(skill),即说课应该包括那些环节,

According to the theory of relativity, nothing can travel faster than light.

根据相对论，任何东西都无法超越光速。

the theory and practice of language teaching

语言教学理论与实践

I have this theory that most people prefer being at work to being at home.

依我看，多数人喜欢工作而不愿待在家里。

In theory, these machines should last for ten years or more.

从理论上讲，这些机器应能用十年以上。

That sounds fine in theory, but have you really thought it through?

这话听起来很有道理，但是你真正全面考虑过没有？

Marx produced a new theory about historical change based upon conflict between competing groups...

马克思创立了一种新理论，认为历史的演变是基于对立集团之间的冲突之上的。

Einstein formulated the theory of Relativity in 1905.

爱因斯坦于 1905 年创立了相对论。

There was a theory that he wanted to marry her...

有人认为他想娶她。

My theory about divorce is that it's not the split-up that damages children, it's how it is handled.

我对离婚的看法是，伤害孩子的不是婚姻的破裂，而是处理离婚的方式。

He taught us music theory.

他教我们乐理。

...graduates who are well-trained in both the theory and practice of statistics.

在统计学理论和实践两方面都训练有素的毕业生

A school dental service exists in theory, but in practice, there are few dentists to work in them.

照理说，学校也有牙医诊所，可实际上，里面的牙医寥寥无几。

He is too old to go to school.

他太老了,不能去学校了.

His experiment negatived the theory.

他的实验驳斥了这个理论.

Einstein's theory of relativity won for him universal esteem.

爱因斯坦的相对论赢得了全世界对他的崇敬.

Copernicus was terribly persecuted for his scientific theory.

哥白尼由于其科学理论而遭到严重的迫害.

The theory is of limited usefulness.

这个理论用途有限.

This theory was initially received with great scepticism by her fellow scientists.

她的科学界同行最初对这一理论持有强烈的怀疑态度.

He hasn't a leg to stand for this theory of his.

他的这种理论是站不住脚的.

The theory is not yet scientifically established.

这个理论尚未被科学地证实.

The scientist elucidated his theory by three simple demonstrations.

这位科学家以三个简单的实例来说明他的理论.

I find your theory is untenable and it must be rejected.

我觉得你的理论是站不住脚的,必须予以摒弃.

He cited Australia's sporting success as evidence for his theory.

他引用澳大利亚体育方面的成功来证明他的理论.

The doctrine of surplus value is the cornerstone of Marx's economic theory.

剩余价值学说是马克思经济理论的基石.

Ade couldn't relate the phenomena with any theory he knew.

艾德无法用他所知道的任何理论来解释这种现象.

Einstein's theory of relativity is very abstruse.

爱因斯坦的相对论非常难懂.

Most of us don't hold with his theory.

我们大多数人不同意他的看法.

These new facts make the theory improbable.

这些新出现的事实使这一理论变得荒谬.

1. There are many theories about the origin of life.
   关于生命起源的学说有很多。
2. Your plan sounds fine in theory.
   你的计划在理论上听起来不错。
3. He was studying music theory.
   他在学习乐理。
4. She has a theory that drinking milk prevents colds.
   她有一种说法,认为喝牛奶能防止感冒。

动词+～

• theory">accept theory接受理论
• theory">have a theory有一种说法

形容词+～

• theory">abstract〔crude〕 theory抽象〔不成熟〕的理论

介词+～

• theory">in theory在理论上
• theory">on the theory根据理论

～+介词

• theory%20about%20writing">theory about writing写作理论
• theory%20of%20gravitation">theory of gravitation万有引力学说

• My aunts and uncle had..no theories about child upbringing.

  出自：Day Lewis

• ☆ 16世纪90年代进入英语，直接源自后期拉丁语的theoria；最初源自古希腊语的theoria，意为沉思，冥想。