“Lower Permian”的概念、定义、翻译、参考文献-科学参考

单词	Lower Permian
释义	Lower Permian [`lō·ǝr `pǝr·mē·ǝn] ^GEOLOGY The earliest epoch of the Permian period of geologic time, extending from about 275- to 260,000,000 years ago.
随便看	fixed emplacement fixed end fixed-end beam fixed-end column fixed end moment fixed-feed grinding fixed field fixed-field accelerator fixed-field method fixed fin fixed-focus lens fixed form coding fixed gun fixed-head disk fixed inductor fixed ion fixed-length field fixed-length operation fixed-length record fixed-level chart fixed light fixed linkage system fixed logic fixed medium fixed memory

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。