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| air management | |||
| 大 气管理: 42 phrases in 12 subjects |
| Automobiles | 1 |
| Aviation | 2 |
| Business | 1 |
| Desert science | 2 |
| Earth sciences | 20 |
| Ecology | 2 |
| Economy | 1 |
| Electronics | 3 |
| Environment | 2 |
| Technology | 5 |
| United Nations | 1 |
| United States | 2 |
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