资料来源 : Webster's Revised Unabridged Dictionary (1913)

Semitransparency \Sem`i*trans*par"en*cy\, n.
   Imperfect or partial transparency.

资料来源 : WordNet®

semitransparency
     n : the quality of allowing light to pass diffusely [syn: {translucence},
          {translucency}]