“Lower Devonian”的概念、定义、翻译、参考文献-科学参考

单词	Lower Devonian
释义	Lower Devonian [`lō·ǝr dǝ`vō·nē·ǝn] ^GEOLOGY The earliest epoch of the Devonian period of geologic time, extending from about 400- to 385,000,000 years ago.
随便看	operational label operational maintenance operational standby program operational unit operational weather limits operation analysis operation analysis chart operation breakdown operation code operation cycle operation decoder operation number operation part operation process chart operation register operations research operations sequence operation time operative ankylosis operator operator algebra operator hierarchy operator interrupt operator process chart operator productivity

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