英语词汇“backwash ripple mark”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	backwash ripple mark
释义	backwash ripple mark backwash ripple mark [′bak‚wäsh ′rip·əl ‚märk] (geology) Ripple marks that are broad and flat and parallel to the shoreline, with narrow, shallow troughs and crests about 30 centimeters apart; formed by backwash above the maximum wave retreat level.
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