principle role主体作用principlen.原理；原则；主义；信念principle of indiscernibles不可辩别的原则principle of stratification分层原理Principle of Sensing Device传感器原理principle of relativization相对性原理Principle of golden section黄金分割原理principle of specialization专业化原理Principle for comprehension理解原则principle of generalization普遍性原则principle of motion picture电影原理Principle of scrupulousness谨慎性原则