“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	ripbit rip channel rip current ripe ripidolite rip panel ripping bar ripping face support ripping lip ripping punch ripple ripple bedding ripple biscuit ripple-carry adder ripple drift ripple filter ripple index ripple lamina ripple load cast ripple mark ripple quantity ripple scour ripple symmetry index ripple tank ripple till

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