“urban purple line”的概念、定义、翻译、参考文献-科学参考

单词	urban purple line
释义	urban purple line Encyclopedia 工学详细规划编制释 urban purple line城市紫线在城乡规划中为了保护建成环境遗产和历史文化资源所确定的特定政策和管理区域的边界线。即历史文化遗产保护区的边界线。
随便看	proper charge density proper chord proper circle proper circular domain proper class proper coloring proper complex orthogonal group proper component proper concave function proper cone quasi convex function proper cone quasi-convex function proper congruence proper conic proper continuum proper conversion proper convex body proper convex cone proper convex function proper convex set proper cover proper cutset proper cycle proper differentiability proper differentiable mapping proper direction

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