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单词 entrance pupil
释义

Definition of entrance pupil in English:

entrance pupil

noun
  • The aperture through which light enters an optical system; the image of the aperture stop as viewed from the front; specifically the image of pupil of the eye as seen from outside the eye; the pupil itself.

Origin

Late 19th century.

Definition of entrance pupil in US English:

entrance pupil

noun
  • The aperture through which light enters an optical system; the image of the aperture stop as viewed from the front; specifically the image of pupil of the eye as seen from outside the eye; the pupil itself.

Origin

Late 19th century.

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更新时间:2024/11/11 13:14:39