triv·i·um /ˈtrɪviəm/
  三學科
  Triv·i·um n.
  1. The three “ liberal” arts, grammar, logic, and rhetoric; -- being a triple way, as it were, to eloquence.
  Note: ☞ The trivium and quadrivium together made up the seven liberal arts. See Quadrivium.
  2. Zool. The three anterior ambulacra of echinoderms, collectively.
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