节水系统

intercommunication system───[通信]内部通信系统

intercommunication systems───[通信]内部通信系统

conservation status───保护现状

nature conservation───自然保护；自然保育；自然保持

urban conservation area───城市保护区

Laban dance notation system───拉班舞记谱系统

satellite navigation system───卫星导航系统

study on construction technology of soil and water conservation forest system in large project district in semi arid desertification grasslands has been done.───对在半干旱荒漠草地大型项目区水土保持林体系的建设技术做了研究。

Each group of children was given a portion of this school to design the water collection or water conservation system.───学校的一个部位分配给每组孩子，让他们为这个位置设计蓄水装置。

Each group of children was given a portion of this school to design the water collection or water conservation system.───我们将学校的一个部位分配给每组孩子，让他们为这个位置设计蓄水装置。

Application study on interlocking concrete block in the soil and water conservation system───新型砌块水土保持系统的应用研究

Design Study on the Soil and Water Conservation System of Interlocking Concrete Block───联锁式砼砌块水土保持系统的设计研究