“water conservancy of ancient Beijing city”的概念、定义、翻译、参考文献-科学参考

单词	water conservancy of ancient Beijing city
释义	water conservancy of ancient Beijing city Encyclopedia 工学〔中国古代城市水利〕释 water conservancy of ancient Beijing city古代北京城水利北京位于永定河与潮白河洪积冲积扇脊部，这两条河都距城区较远流过，引用存在许多困难。北京降水量年内分布很不均匀，总径流量偏少，自古就是缺水地区。开发利用永定河与潮白河水资源并防止其洪水灾害，是古代北京城水利的重点。
随便看	central conic Central Conservatory of Music central control room central control system of wind farm cluster central coordinate system central core central curve central cylinder central dark field imaging central dark-field imaging central dark ground method central date central delay Central Department of Propaganda and Agitation of the Central Committee of the CPSU central derivative central diaphragm method central difference central difference; centered difference central difference notation central difference operator central difference quotient central dilation central disaster-prevention green space central dislocation of hip joint central distributed PV inverter system

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