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| self-control of source of water; water conservation function; water source conservation; water-source conservation | |||
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水源涵养 : 14 phrases in 7 subjects |
| China | 1 |
| Desert science | 2 |
| Earth sciences | 1 |
| Ecology | 7 |
| Hydroelectric power stations | 1 |
| Technology | 1 |
| Water resources | 1 |
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