Rier里尔RIabbr.折光指数（=refractive index）abbr.罗得岛（=Rhode Island）abbr.无线电惯性制导航系统(=Radio-Inertial Guidance System)rising reasons产生原因Riviere's signRivinus' ductsRiemann method黎曼方法Riemarm solver黎曼解Rieux's herniaRila Formation日拉组Risley's prismrising of arch起拱rillcut mining伪倾斜倒台阶回采