资料来源 : pyDict

陈年葡萄酒表面薄膜

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

Beeswing \Bees"wing`\, n.
   The second crust formed in port and some other wines after
   long keeping. It consists of pure, shining scales of tartar,
   supposed to resemble the wing of a bee.