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单词 aggradational
释义

WordReference Random House Unabridged Dictionary of American English © 2024
ag•grade  (ə grād),USA pronunciation v.t., -grad•ed, -grad•ing. [Phys. Geog.]
  1. Geographyto raise the grade or level of (a river valley, a stream bed, etc.) by depositing detritus, sediment, or the like. Cf. degrade.
  • 1895–1900; ag- + grade
ag•gra•da•tion  (ag′rə dāshən),USA pronunciation n.  ag′gra•dation•al, adj. 

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