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 tox·in /ˈtɑksən/
 毒素

 tox·in /ˈtɑksən/ 名詞
 毒,毒素

 Tox·in, Tox·ine  n.  A poisonous product formed by an organism, such as a pathogenic bacterium, a plant or an animal, usually having a high molecular weight, often a protein or a polysaccharide, but occasionally a low-molecular weight agent such as tetrodotoxin.
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 toxin
      n : a poisonous substance produced during the metabolism and
          growth of certain microorganisms and some higher plant
          and animal species