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1. Oxford American Dictionary

   pupil

   • IPA[ˈpyo͞op(ə)l]

   美式

   • n.
     the dark circular opening in the center of the iris of the eye, varying in size to regulate the amount of light reaching the retina

   • noun: pupil, plural noun: pupils

2. • 釋義

   n.

   名詞

   • 1. the dark circular opening in the center of the iris of the eye, varying in size to regulate the amount of light reaching the retina your pupils are dilated she shines a light into his pupil