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| 边缘地区 (指干旱区、半干旱区以及山区，是与经济发达地区相对而言的。边缘地区是今后人类拓宽生存空间的后备基地) | |||
| marginal region: 3 phrases in 2 subjects |
| Agriculture | 1 |
| Technology | 2 |
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