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单词
index fossil
释义
index fossil
noun
:
a fossil that is usually of narrow time range and wide spatial distribution and that is used in the identification of related geologic formations (as in locating new petroleum reserves)
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braille
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brain
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brain death
brain-drain
brain drain
brained
brained
brainer
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brain-fever bird
brainge
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更新时间:2024/12/23 22:44:39