原则；原理；道义；节操原则( principle的名词复数 )；准则；工作原理；[P-]（基督教科学派信奉的）神圣的原理；
"their principles of composition characterized all their works"
同义词：rule
"a man of principle"; "he will not violate his principles"
"the principles of democracy"
"the principle of the conservation of mass"; "the principle of jet propulsion"
同义词：rule
同义词：precept
"the principles of internal-combustion engines"
同义词：rationale
accounting principles会计原理，会计学
business principles经营原则
principles of management管理学原理
mechanical principles机械原理
principles of marxism马克思主义原理
generally accepted accounting principles公认会计原则
principles of operation工篆理
principles of accounting会计原理
principles of chemical engineering化工原理
principles of political economy政治经济学原理（马克思著作）
investment principles投资学