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

• In scientific research, one should break new paths and not be fettered by accepted theories.
  进行科学研究，不能囿于成说，要敢于创新。
• 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。
• There are many theories that claim to be able to predict whether you're carrying a boy or a girl.
  有许多理论声称能够预测胎儿的性别。
• We will then have a firmer foundation of fact on which to build theories
  那样我们将会获得一个建立理论所需的更为牢固的事实基础。
• We'll always justify our actions with noble sounding theories
  我们总会用听起来非常高尚的理论为我们的行动辩护。
• They talked about the competing theories of the origin of life.
  他们讨论了几种相互矛盾的生命起源理论。
• Physics is the best example of a science which has developed strong, abstract theories.
  物理学是自然科学中发展出了强有力的抽象理论的最好例子。
• Many theories on punishment exist, all of which are variations on a theme.
  关于惩罚的理论有很多，虽形式略有不同，但其主旨都是一样的。
• 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。
• The police have several theories about the case, but no hard evidence.
  警方对这个案件有好几种分析，但都缺乏确实的证据。