spec·ta·tor /ˈspɛkˌtetɚ/
 觀眾,目擊者,旁觀者
 Spec·ta·tor n.  One who on; one who sees or beholds; a beholder; one who is personally present at, and sees, any exhibition; as, the spectators at a show. “Devised and played to take spectators.”
 Syn: -- Looker-on; beholder; observer; witness.
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 spectator
      n 1: a close observer; someone who looks at something (such as an
           exhibition of some kind); "the spectators applauded the
           performance"; "television viewers"; "sky watchers
           discovered a new star" [syn: witness, viewer, watcher,
            looker]
      2: a woman's pump with medium heel; usually in contrasting
         colors for toe and heel [syn: spectator pump]