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

• 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。
• 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。
• 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。
• 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。
• 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。
• 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。
• 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。
• 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。
• Such theories are still very tentative.
  这种理论仍然是探索性的。
• 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。