推荐回答（3个）
英语音标：[ˈprɪnsɪp(ə)l]
美语音标：[ˈprɪnsəpl]
中文翻译
n.原理；原则；主义；信念
单词例句
用作名词 (n.)
A bicycle and a motorcycle are built on the same principle. 自行车和摩托车是根据同样的原理制造的。
Archimedes ,a great physicist ,discovered the principle of floating bodies . 阿基米德，一位伟大的物理学家，发现了浮体原理。
It is easier to fight for one's principle than to live up to them. 为自己的主义斗争，要比他们施诸实践更容易。
He refused to attend the meeting on principle. 他出于信念拒绝参加这次会议。
语法用法
principle或principles都有表示“道德，情操”的意思。 He has both ability and principle(s).他既有能力又有情操。
in principle指“原则上，大体上”。 I accept the suggestion in principle.大体上来说，我接受这些建议。
on principle指“根据原则”或“按照”。 I accept the suggestion on principle.根据原则，我接受这些建议。 He acted always on principle.他总是按原则办事。
principal同principle的比较：两者的发音一样。principal作形容词时，指“主要的，首要的”，而作名词时，指“首长，负责人”。而principle是一种科学定律或者道德规范。
n.原理；原则；主义；道义；本质；本义；根源；源泉
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