compactness
  緊密度
  compactness
  緊緻性
  compactness
  緊密
  Com·pact·ness, n. The state or quality of being compact; close union of parts; density.
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  compactness
       n 1: the spatial property of being crowded together [syn: concentration,
             density, denseness] [ant: distribution]
       2: the consistency of a compact solid