“杜能环”的概念、定义、翻译、参考文献-科学参考

单词	杜能环
释义	杜能环 Encyclopedia 经济学农业区位论释 Thunen's circles杜能环德国经济学家J.H.von杜能（Johan Heinrich von Thunnen，1783～1850）提出的有关农业生产布局的圈层结构。
随便看	plane strain fracture toughness plane subsystem plane sundial plane surface plane surface system plane symmetry planet planet aberration planet aberration, planetary aberration plane table plane-table equipment plane table surveying plane-table traverse Planet-A probe planetaria planetarium planetarium software planetary planetary aberration planetary activator planetary alignmentm planetary and lunar ephemerides Planetary and Space Science planetary assembly planetary astronomy

科学参考收录了854744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。