RR
剑桥词典
RR (TRAIN)
written abbreviation for railroad noun
鉄路,鉄道(railroad的縮寫)
RR (POST)
written abbreviation for rural route : used in addresses in some areas in the US
鄕村郵件投遞路線(用於美國鄕村地區通信地址中,rural route的縮寫)
RR (BREATHING)
medical specializedwritten abbreviation for respiratory rate (= the rate at which someone breathes in and out)
呼吸頻率(respiratory rate的縮寫) 返回 RR