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单词 dee
释义 dee
 /dee/,  n.  
  1. a metal loop attached to tack, for fastening gear: to hang wire cutters from a dee on a saddle.
  2.  Physics.   a hollow electrode for accelerating particles in a cyclotron.
 [1785-95; so called from its shape, which resembles the letter D]
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更新时间:2025/2/24 22:46:46