ter·ror·ism /ˈtɛrɚ/
  恐怖主義;恐怖行為
  Ter·ror·ism n.
  1. The act of terrorizing, or state of being terrorized; a mode of government by terror or intimidation.
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  terrorism
       n : the calculated use of violence (or threat of violence)
           against civilians in order to attain goals that are
           political or religious or ideological in nature; this is
           done through intimindation or coercion or instilling fear
           [syn: act of terrorism, terrorist act]