impressiveness
  感人,難忘
  Im·press·ive a.
  1. Making, or tending to make, an impression; having power to impress; adapted to excite attention and feeling, to touch the sensibilities, or affect the conscience; as, an impressive discourse; an impressive scene.
  2. Capable of being impressed. [Obs.]
  -- Im*press*ive*ly, adv. -- Im*press*ive*ness, n.
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  impressiveness
       n : splendid or imposing in size or appearance; "the grandness
           of the architecture" [syn: grandness, magnificence]