“ripple symmetry index”的概念、定义、翻译、参考文献-科学参考

单词	ripple symmetry index
释义	ripple symmetry index [`rip·ǝl `sim·ǝ·trē ´in´deks] ^GEOLOGY A measure of the degree of symmetry of a ripple mark, equal to the ratio of the length of the gentle (upcurrent) side to the steep (downcurrent) side.
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