ob·serv·er /əbˈzɝvɚ/
 觀測者,觀察員;遵守者


 Ob·serv·er n.
 1. One who observes, or pays attention to, anything; especially, one engaged in, or trained to habits of, close and exact observation; as, an astronomical observer.
    The observed of all observers.   --Shak.
 Careful observers may foretell the hour,
 By sure prognostic, when to dread a shower.   --Swift.
 2. One who keeps any law, custom, regulation, rite, etc.; one who conforms to anything in practice. “Diligent observers of old customs.”
    These . . . hearkened unto observers of times.   --Deut. xviii. 14.
 3. One who fulfills or performs; as, an observer of his promises.
 4. A sycophantic follower. [Obs.]

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 observer
      n 1: a person who becomes aware (of things or events) through the
           senses [syn: perceiver, beholder]
      2: an expert who observes and comments on something [syn: commentator]