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| NOUN |
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| /ˈprɪnsəpl/ |
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| 1 | C a basic belief , theory , or rule that has a major influence on the way in which something is done 原则；原理 |
| Excellent customer service should be our guiding principle. 提供完善的客户服务应该是我们的指导原则。 |
| +of It is a basic principle of English law that a person is innocent until proven guilty. 英国法律的一项基本原则是一个人在被证明有罪之前是无辜的。 |
| +that the principle that education should be free to everyone 人人都有权接受教育的原则 |
| | 1a | one of the major ideas or theories that a system of beliefs is based on , for example in religion or politics （宗教或政治的）主义，信条 | | Marxist/Buddhist/democratic principles 马克思主义/佛教教义/民主主义 | | the principles and ideals that the party stands for 该党主张的信条和理想 | |
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| 2 | C usually plural a basic rule or belief about what is right and morally good , that influences the way you behave and the way you treat other people （行为）准则，原则 |
| He seems to have absolutely no principles. 他好像毫无原则。 |
| against sb’ s principles It was against their principles to join the armed forces. 参加武装部队有违他们的准则。 |
| stick to/stand by your principles Bennett stuck to his principles, and refused to name the source of his information. 贝内特坚持自己的原则，拒绝说出他的消息来源者的名字。 |
| | 2a | U morally correct behaviour 道义；正直 | | a woman of principle 正直的女子 | | on principle We are opposed on principle to any collaboration with terrorists. 基于道德准则，我们反对和恐怖主义者进行任何合作。 | | a point/matter/issue of principle There are some basic issues of principle relating to the debate about abortion. 有关堕胎的辩论有一些基本的原则问题。 | |
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| 3 | C a scientific theory or basic natural law that explains the way in which something works 原理 |
| Windmills differ in design, but all operate on exactly the same principle. 风车的设计不同，但操作原理都是完全相同的。 |
| Heisenberg’ s Uncertainty Principle 海森伯测不准原理 |
| +of It was Darwin who first identified the ‘principle of female choice’ . 是达尔文首先发现了“雌性选择规律”。 |
| PHRASE |
| - | in principle
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| 1 | used for saying that something is possible in theory , although it has not yet been tried 理论上；从理论上讲 | In principle, there is no reason why the same cloning techniques should not work on human cells. 从理论上讲，把相同的克隆技术运用在人体细胞上未尝不可。 | |
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| 2 | used for saying that you agree/disagree with something as a result of your moral , religious , or political beliefs 出于（道德、宗教或政治）原则；原则上 | We’ re opposed in principle to any form of capital punishment. 我们原则上反对任何形式的死刑。 | |
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