impassively
  (ad.)無感情地
  Im·pas·sive a. Not susceptible of pain or suffering; apathetic; impassible; unmoved.
     Impassive as the marble in the quarry.   --De Quincey.
     On the impassive ice the lightings play.   --Pope.
  -- Im*pas*sive*ly, adv. -- Im*pas*sive*ness, n.
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  impassively
       adv : in an impassive manner; "he submitted impassively to his
             arrest"