“Lower Jurassic”的概念、定义、翻译、参考文献-科学参考

单词	Lower Jurassic
释义	Lower Jurassic [`lō·ǝr ju̇`ras·ik] ^GEOLOGY The earliest epoch of the Jurassic period of geologic time, extending from about 185- to 170,000,000 years ago.
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