KR
  知識表示
  Kr 符號
  Kr
       n 1: a colorless element that is one of the six inert gasses;
            occurs in trace amounts in air [syn: krypton, atomic
            number 36]
       2: a communist organization formed in Cambodia in 1970; became
          a terrorist organization in 1975 when it captured Phnom
          Penh and created a government that killed an estimated
          three million people; was defeated by Vietnamese troops
          but remained active until 1999 [syn: Khmer Rouge, Party
          of Democratic Kampuchea, Communist Party of Kampuchea]