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单词 planation
释义 pla·na·tion
\plāˈnāshən, pləˈ-\ noun
(-s)
Etymology: plane (IV) + -ation
: a process of erosion that produces flat surfaces: as
 a. : lateral erosion by a meandering stream that widens its floodplain
 b. : erosion by waves and currents that results in wave-cut platforms
 c. : abrasive action of a glacier or of wind that planes or facets a previously rounded or irregular stone
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更新时间:2024/9/20 21:33:39