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等 度图 : 42 phrases in 9 subjects |
| Chemistry | 2 |
| Engineering geology | 1 |
| Information technology | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 7 |
| Project management | 1 |
| Space | 3 |
| Technology | 25 |
| United States | 1 |
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