您要查找的是不是：
- Polk Soil& Water Conservation District is one of Oregon's45 Districts assisting landowners in resource conservation. 描述:波尔水土保护区是俄勒冈州45个水土保护区之一，创建于1996年四月，主要是给与该地区土地所有者在水土保护方面以协助。
- Benton Soil& Water Conservation District is one of Oregon's45 Districts assisting landowners in resource conservation. 描述:本顿水土保持区是俄勒冈州45个水土保持区之一，主要是给与该地区土地所有者在水土保护方面以协助。
- soil and water conservation districts 水土保持分区
- water conservation district 水源保护区
- Law of soil and water conservation. 国家制定颁布的水土保持法令。
- Trees are helpful in water conservation. 树木有助于涵养水源。
- Fengtai District Water Conservancy Engineering Co. 丰台水利工程公司。
- The Mauna Kea summit is a conservation district because it is a fragile and unique alpine ecosystem that serves as a major source of water for the entire island of Hawaii. 茂纳凯亚峰是脆弱又独特的高山生态系统，并且是整个夏威夷岛的主要水源，因此被列为生态保区。
- Soil and Water Conservation Benefits of Terracing on the Slope et al. 坡改梯的水土保持效益研究。
- Urban water conservation programs must adapt to local circumstances. 城市节水计划必须适合当地条件。
- Title： Soil and Water Conservation Benefits of Terracing on the Slope et al. 关键词：坡耕地;新梯田;老梯田;水土保持效益
- Forestry and water conservancy made new progress. 林业、水利建设取得了新进展。
- Now we have to rebuild the existing water conservation facilities and dig wells in some places. 现在要考虑对原来的水利工程进行修补，有的地方要打一点井。
- Xiangkun Water Conservancy Construction Co., Ltd. 翔鲲水务建设有限公司。
- Dadi Water Conservancy Foundation Engineering Co. 大地水利地基工程公司。
- Notable achievements made in water conservancy. 水利建设成就显著。
- We have also built150small water conservancy works. 我们还修建了一百五十项小型水利工程。
- Source:Tianjin Municipal Water Conservancy Bureau. 资料来源：天津市水利局。
- Histodcal and cultural conservation district 历史文化保护区
- ecological functional conservation district 生态功能保护区
