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| livelihood analysis | |||
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生计分析 : 13 phrases in 10 subjects |
| Agriculture | 1 |
| Aviation | 1 |
| Business | 1 |
| Desert science | 1 |
| Earth sciences | 3 |
| Ecology | 1 |
| Economy | 2 |
| Management | 1 |
| Space | 1 |
| Technology | 1 |
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