英语词汇“roundstone”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	roundstone
释义	roundstone roundstone [′rau̇nd‚stōn] (geology) Any naturally rounded rock fragment of any size larger than a sand grain (diameter greater than 2 millimeters), such as a boulder, cobble, pebble, or granule.
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