jewel

jewel
noun
  1. a precious stone, typically a single crystal or piece of a hard lustrous or translucent mineral cut into shape with flat facets or smoothed and polished for use as an ornament
    宝石
    ■(一般作 jewels)an ornament or piece of jewellery containing such a stone or stones
    宝石饰物；首饰
    ■a hard precious stone used as a bearing in a watch, compass, or other device
    （钟表、指南针等仪器用）宝石轴承，钻
    ■a very pleasing or valued person or thing; a very fine example
    令人喜爱的人（或物）；令人尊重的人（或物）；典范，模范
    she was a jewel of a nurse.
    她是一个极好的护士。
派生
the jewel in the (或 one's) crown
  1. the most valuable or successful part of something
    （某物）最珍贵（或成功）的部分（或方面）
    quality education was once the jewel in Britain's crown.
    优良教育曾是大不列颠王国最成功的方面。
语源
  1. Middle English: from Old French joel, from jeu 'game, play', from Latin jocus 'jest'
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