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美国 地质局 : 24 phrases in 10 subjects |
| Aviation | 2 |
| Desert science | 2 |
| Earth sciences | 6 |
| General | 2 |
| Geology | 1 |
| Geophysics | 2 |
| Navigation | 1 |
| Oil / petroleum | 1 |
| Space | 1 |
| Technology | 6 |
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