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复合系统 : 83 phrases in 18 subjects |
| Air defense | 3 |
| Automobiles | 2 |
| Aviation | 3 |
| Chemistry | 1 |
| Desert science | 2 |
| Drilling | 1 |
| Earth sciences | 3 |
| Ecology | 4 |
| Electronics | 10 |
| Forestry | 1 |
| Hydroelectric power stations | 1 |
| Information technology | 1 |
| Oil / petroleum | 1 |
| Refrigeration | 6 |
| Space | 28 |
| Technology | 13 |
| Telecommunications | 1 |
| Water resources | 2 |
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