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| 51. | Drag onto the page to add a one-way valve to prevent contamination of water source. |
| 拖到绘图页后，可以添加用于防止水源污染的单向阀门。 |
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| 52. | static water supply |
| 静态水源 |
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| 53. | watershed forest |
| 水源涵养林 |
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| 54. | The Dead Sea has been shrinking for decades8 as the inflow dwindles from its main source, the Jordan |
| 随著主要水源约旦河的流量减缩，数十年来，死海日渐缩小。 |
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| 55. | water resource for irrigation |
| 灌溉水源 |
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| 56. | shelter belts to protect the headwaters of rivers |
| 水源林 |
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| 57. | conservation of water resources |
| 水源涵养 |
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| 58. | Relevant measures for ecological agriculture, a large-scale water-source-nourishing forest and the domestic |
| 自来水八厂防护区内继续实施生态农业、水源涵养林、村镇生活污染物治理等相关措施，并建成万亩水源保护林。 |
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| 59. | water mobile supply |
| 移动式水源 |
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| 60. | Protecting drinking water sources ? |
| 保护饮用水源。 |
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