“Thunen's circles”的概念、定义、翻译、参考文献-科学参考

单词	Thunen's circles
释义	Thunen's circles 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	hexagonality closure condition hexagonal lattice hexagonal net hexagonal nomogram hexagonal number hexagonal nut hexagonal phase hexagonal prism hexagonal pyramid hexagonal pyramidal number hexagonal scalenohedron hexagonal square number hexagonal-square roll pass sequence hexagonal system hexagonal web hexagon pattern hexagon tiling hexagram hexahedral hexahedral angle hexahedral apparatus hexahedral graph hexahedral representation hexahedrite hexahedron

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