principle model主模型principlen.原理；原则；主义；信念principle diagram of electric control电器控制原理图principle of ac-tion through medium媒质作用原理principle of conservation of momentum动量守恒原理principle and application of computer微机原理与应用principle of software standardization软件标准化原理principle of resident potential energy势能驻值原理principle of cephalocaudal development前后发展原则principle of international sovereignty主权原则例外principle of hypothetical compensation假想的补偿原理principle of pecuniary self-interest物质利益原则