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plumb line    我要挑错精准翻译

参考词典中plumb line的常规释义:

基本释义
  • n. 铅垂线
英英解释
  •  1个名词解释

    1. a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point
      [同] perpendicular, plumb line
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