theories

英 [ˈθɪəriz]

美 [ˈθɪriz]

n.  学说; 论; 说; 理论; 原理; 原则; (未证明的)意见; 看法; 推测
theory的复数

柯林斯词典

• N-VAR 理论;学说
  Atheoryis a formal idea or set of ideas that is intended to explain something.
  1. 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。
  2. Einstein formulated the Theory of Relativity in 1905.
     爱因斯坦于 1905 年创立了相对论。
• N-COUNT 观点;见解
  If you have atheoryabout something, you have your own opinion about it which you cannot prove but which you think is true.
  1. There was a theory that he wanted to marry her...
     有人认为他想娶她。
  2. 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。
• N-UNCOUNT (实践科目、技能的)理论基础
  Thetheoryof a practical subject or skill is the set of rules and principles that form the basis of it.
  1. He taught us music theory.
     他教我们乐理。
  2. ...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
• PHRASE 从理论上说;照理说
  You usein theoryto 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.
  1. 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。

双语例句

• Such theories are still very tentative.
  这种理论仍然是探索性的。
• Folk psychology comes closer to the obvious truth than the most sophisticated theories.
  比起最复杂的理论，大众心理学更接近那些显而易见的事实。
• All our theories sound pretty lame.
  我们的理论似乎全都站不住脚。
• Over the years several similar theories have been put forward
  几年来已经有好几个类似理论相继提出。
• All theories originate from practice and in turn serve practice.
  任何理论都来源于实践，反过来为实践服务。
• Then, we introduce a single intersection and coordination of the basic theories and methods of control.
  其次介绍了单交叉口和协调控制基本理论和方法。
• Einstein's theories opened up a whole new field for study.
  爱因斯坦的理论揭开了一个全新的研究领域。
• Many theories have been advanced as to why some women suffer from depression
  就一些女性患抑郁症的原因，各种说法纷至沓来。
• I was itching to get involved and to bring my own theories into practice
  我渴望参与其中，把我的理论付诸实践。
• The knowledge base of the project is formed on theories connected with working conditions and the quality of working life and empirical researches.
  这个项目的理论基础由关于工作条件和工作质量的理论以及经验调查组成。