sterilization
  使成不毛,斷種,殺菌,絕育
  ster·il·iza·tion /ˌstɛrələˈzeʃən/ 名詞
  滅菌,殺菌,消毒,絕育,不育化
  Ster·il·i·za·tion n. Biol. The act or process of sterilizing, or rendering sterile; also, the state of being sterile.
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  sterilization
       n 1: the act of making an organism barren or infertile (unable to
            reproduce) [syn: sterilisation]
       2: the procedure of making some object free of live bacteria or
          other microorganisms (usually by heat or chemical means)
          [syn: sterilisation]