expressiveness
  表現;表示
  Ex·press·ive a.
  1. Serving to express, utter, or represent; indicative; communicative; -- followed by of; as, words expressive of his gratitude.
     Each verse so swells expressive of her woes.   --Tickell.
  2. Full of expression; vividly representing the meaning or feeling meant to be conveyed; significant; emphatic; as, expressive looks or words.
     You have restrained yourself within the list of too cold an adieu; be more expressive to them.   --Shak.
     Through her expressive eyes her soul distinctly spoke.   --Littelton.
  -- Ex*press*ive*ly,adv. -- Ex*press*ive*ness,n.
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  expressiveness
       n : the quality of being expressive