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1. Oxford American Dictionary

   lens

   • IPA[lenz]

   美式

   • n.
     a piece of glass or other transparent substance with curved sides for concentrating or dispersing light rays, used singly (as in a magnifying glass) or with other lenses (as in a telescope).；the light-gathering device of a camera, typically containing a group of compound lenses.

   • noun: lens, plural noun: lenses

2. • 釋義

   n.

   名詞

   • 1. a piece of glass or other transparent substance with curved sides for concentrating or dispersing light rays, used singly (as in a magnifying glass) or with other lenses (as in a telescope).
   • ▪ the light-gathering device of a camera, typically containing a group of compound lenses.
   • ▪ short for crystalline lens
   • ▪ short for contact lens
   • ▪ an object or device which focuses or otherwise modifies the direction of movement of light, sound, electrons, etc.