co
 同樣的


 CO
      n 1: an odorless very poisonous gas that is a product of
           incomplete combustion of carbon [syn: carbon monoxide,
            carbon monoxide gas]
      2: a hard ferromagnetic silver-white bivalent or trivalent
         metallic element; a trace element in plant and animal
         nutrition [syn: cobalt, atomic number 27]
      3: one who refuses to serve in the armed forces on grounds of
         conscience [syn: conscientious objector]
      4: a state in west central United States in the Rocky Mountains
         [syn: Colorado, Centennial State]