en·do·tox·in /ˌɛndoˈtɑksən/
  內毒素
  en·do·tox·in /ˌɛndoˈtɑksən/ 名詞
  內毒素
  endotoxin
       n : a toxin that is confined inside the microorganisms and is
           released only when the microorganisms are broken down or
           die [ant: exotoxin]