speculator
 投機者,投機商人,思索者


 Spec·u·la·tor n.  One who speculates. Specifically: (a) An observer; a contemplator; hence, a spy; a watcher. [Obs.]
 (b) One who forms theories; a theorist.
    A speculator who had dared to affirm that the human soul is by nature mortal.   --Macaulay.
 (c) Com. One who engages in speculation; one who buys and sells goods, land, etc., with the expectation of deriving profit from fluctuations in price.

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 speculator
      n 1: someone who makes conjectures without knowing the facts
      2: someone who risks losses for the possibility of considerable
         gains [syn: plunger]