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季节变化 : 45 phrases in 17 subjects |
| Architecture | 1 |
| Business | 1 |
| Commerce | 2 |
| Consulting | 1 |
| Desert science | 2 |
| Earth sciences | 1 |
| Ecology | 1 |
| Economy | 6 |
| Engineering geology | 2 |
| Environment | 1 |
| General | 2 |
| International trade | 1 |
| Securities | 1 |
| Space | 2 |
| Statistics | 1 |
| Technology | 19 |
| Water resources | 1 |
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