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| occurrence frequency | |||
| frequency of occurrence | |||
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发生 频率 : 38 phrases in 14 subjects |
| Air defense | 3 |
| Automated equipment | 1 |
| Aviation | 1 |
| Ecology | 1 |
| Electric machinery | 1 |
| Electronics | 12 |
| Environment | 2 |
| Geophysics | 1 |
| Information technology | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Shipbuilding | 2 |
| Space | 1 |
| Technology | 10 |
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