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

• Don't let yourself be distracted by fashionable theories
  不要让自己被流行的理论分散了注意力。
• All our theories sound pretty lame.
  我们的理论似乎全都站不住脚。
• This innovation is the ecological security of the theories and methods used in eco-tourism resources development study.
  本文创新之处在于把生态安全的理论和方法运用到生态旅游资源开发研究中。
• 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。
• Such theories are still very tentative.
  这种理论仍然是探索性的。
• 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。
• 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。
• 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。
• Psychiatrists become too caught up in their theories to deal adequately with reality.
  精神病专家太纠结于理论，无法很好地处理现实问题。
• Da Vinci was methodical in his research, carefully recording his observations and theories
  达·芬奇搞研究井井有条，会详细记录观察资料和理论学说。