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  • 牛津词典

  • guide fossil

    • 英 [ɡaid ˈfɔsl]
    • 美 [ɡaɪd ˈfɑsəl]

    释义

    • 标准化石

  • 英英释义

    Noun

    • 1. a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found
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