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  1. Oxford Dictionary

    mother lode

    英式

    • n.
      a principal vein of an ore or mineral.；a rich source of something

    • noun: mother lode, plural noun: mother lodes

    • 釋義

    名詞

    • 1. a principal vein of an ore or mineral.
    • ▪ a rich source of something your portfolio holds a mother lode of opportunities