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一次 源 : 30 phrases in 14 subjects |
| Aviation | 1 |
| Ecology | 3 |
| Economy | 1 |
| Electronics | 6 |
| Forestry | 1 |
| Geophysics | 1 |
| Information technology | 1 |
| International trade | 1 |
| Management | 1 |
| Oil / petroleum | 1 |
| Refrigeration | 1 |
| Space | 5 |
| Technology | 6 |
| Wind Energy | 1 |
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