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| 天然储藏量; 自然保护区 | |||
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| 天然储量 | |||
| 自然保护区; 天然保护区 | |||
| natural reserves: 12 phrases in 5 subjects |
| Bridge construction | 1 |
| Ecology | 4 |
| Oil / petroleum | 1 |
| Securities | 1 |
| Technology | 5 |
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