 |
| 谱 密度: 161 phrases in 24 subjects |
| Air defense | 4 |
| Artificial intelligence | 2 |
| Aviation | 5 |
| Bridge construction | 4 |
| Communications | 1 |
| Construction | 1 |
| Earth sciences | 14 |
| Ecology | 2 |
| Electric machinery | 1 |
| Electronics | 23 |
| General | 4 |
| Geophysics | 11 |
| Information technology | 1 |
| Mathematics | 2 |
| Metallurgy | 1 |
| Nautical | 1 |
| Oil / petroleum | 3 |
| Physics | 1 |
| Shipbuilding | 1 |
| Space | 16 |
| Technology | 49 |
| Telecommunications | 4 |
| Water resources | 1 |
| Wind Energy | 9 |
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