英语词汇“percussion 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	percussion mark
释义	percussion mark percussion mark [pər′kəsh·ən ‚märk] (geology) A small, crescent-shaped scar produced on a hard, dense pebble by a blow.
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