principle

n ［C］ ① a rule used by a person as a guide for action;habit based on some fixed belief (行动的)准则；规则：～s of conduct 行为准则/I make it a ～ to save some money each month.我坚持每月储蓄一些钱。 ② a general truth or belief that is used as a base for reasoning or action， or for the development of further ideas;a law as governing the making or working of a machine， apparatus， etc 原理；原则；机器(或仪器等的)运转原理：a matter of ～ 原则问题/the ～s of navigation 航空学的原理/One of the ～s of this dictionary is that explanations should be in simple language.本词典的一条原则是，用浅显易懂的语言解释。/A bicycle and a motorcycle are built on the same ～.自行车和摩托车的构造原理一样。

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