r

英[ɑː(r)] 美[ɑːr]
  • n.字母r
r's
  • ra abbr.[化]元素镭(radium)的符号
  • raa abbr.RoyalAcademyofArts;英国皇家艺术院
  • raad n.[动]电鲶(产于尼罗河)
  • raaf abbr.RoyalAustralianAirForce(皇家)澳大利亚空军
  • rabassaire n.农夫
    n. (名词)
    1. 英语字母中的第十八个字母(小写为r)
    2. 半径(radius)的符号
    3. 中世纪罗马数字的80
    4. R音
    5. R的活字
    6. 表示“第十八”的符号
    7. 伦琴射线,X射线(roentgen)的符号
    8. 卢布(ruble)

英英释义

Noun:
  1. a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air

  2. (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole

  3. the 18th letter of the Roman alphabet

  4. the length of a line segment between the center and circumference of a circle or sphere

    1. The trilled `r' is produced by vibrating the tongue against the upper teeth.
      发带颤音的r,舌抬向上齿颤动而成。