“urban system”的概念、定义、翻译、参考文献-科学参考

单词	urban system
释义	urban system Encyclopedia 工学总论释 urban system城镇体系在一定地域范围内，以中心城市为核心，由一系列不同等级规模、不同职能分工、相互密切联系的城镇组成的有机整体。
随便看	lower approximate limit lower approximate value lower arithmetic lower asymptotic density lower atmosphere lower base lower body negative pressure lower Bohl exponent lower bound lower boundary lower boundary condition lower bounded lower bounded variable lower bound of a family lower bound of a function lower bound of an operator lower bound of a set lower bound on the minimum mean square error lower branch lower Burkill integral Lower Canada lower carbon alcohols lower center series lower central chain lower central exponent

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。