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| observation earth system | |||
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观测地球系统 : 41 phrases in 13 subjects |
| Aviation | 5 |
| Desert science | 2 |
| Earth sciences | 9 |
| Ecology | 1 |
| Electronics | 1 |
| Environment | 2 |
| Geology | 3 |
| Geophysics | 1 |
| Information technology | 1 |
| Space | 7 |
| Technology | 4 |
| United Nations | 2 |
| United States | 3 |
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