“percussion mark”的概念、定义、翻译、参考文献-科学参考

单词	percussion mark
释义	percussion mark [pǝr`kǝsh·ǝn ´märk] ^GEOLOGY A small, crescent-shaped scar produced on a hard, dense pebble by a blow.
随便看	DDT DDTA DDVP DEA deaccentuator deacetylation deacidification Deacon process deactivation deacylation dead dead ahead dead air dead-air space dead area dead arm dead astern dead axle dead band deadbeat deadbeat algorithm deadbeat compass deadbeat escapement deadbeat response dead block

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