英语词汇“graptolite shale”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	graptolite shale
释义	graptolite shale graptolite shale [′grap·tə‚līt ′shāl] (geology) Shale containing an abundance of extinct colonial marine organisms known as graptolites.
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