Rach拉什Raabbr.[化]元素镭（radium）的符号Raulin's solution锰三斜辉石Rarta catesbeiana牛娃rale high pitched[医] 高音Ravdan Davaadalai达瓦达莱racing handlebars赛车车把ractical teaching实践教学RA Survey Company皇家炮兵测量连Razdan bunyavirus拉兹丹本扬病毒Rauzier's disease焦熔酚rachitogenic diet[医] 致佝偻病饮食