Rino里诺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)Risa Murakami.村上里沙.risus sardonicus痉笑Riviere's potion逆转蚀刻背面rinsing of drums桶的冲洗Riehl's melanosis自动离合器Riemannian metric黎曼度量Risdon's approach逆分裂riens per descent[法] 无继承资产Rivinus's foramen逆向应力rising prominence上升日珥