principles of law法律原则principlesn.原则；原理；道义；节操名词principle的复数形式.principles of running journals办刊宗旨principles of site-selection选址原则principles of food composition食品结构原则principles of database systems数据库系统原则principles for period division分期原则principles of measuring penalty裁量原则Principles of Operating Systems操作系统原理Principles of Enhanced Strength强化原理Principles of Chemical Industry化工原理principles of structural design结构设计原则