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perturbation : 492 phrases in 49 subjects |
| Agriculture | 7 |
| Astronautics | 59 |
| Astronomy | 13 |
| Automated equipment | 36 |
| Automobiles | 1 |
| Aviation | 51 |
| Banking | 1 |
| Chemistry | 11 |
| Climatology | 1 |
| Computers | 11 |
| Construction | 1 |
| Electrical engineering | 1 |
| Electronics | 8 |
| European Union | 2 |
| Finances | 2 |
| Fishery fishing industry | 1 |
| Food industry | 2 |
| Forestry | 3 |
| General | 7 |
| Geology | 7 |
| Geophysics | 18 |
| GOST | 5 |
| High energy physics | 4 |
| Hydraulic engineering | 5 |
| Information technology | 9 |
| International Monetary Fund | 7 |
| Law | 2 |
| Mathematics | 30 |
| Medical | 9 |
| Medical appliances | 2 |
| Metallurgy | 7 |
| Meteorology | 20 |
| Military | 4 |
| Nuclear physics | 12 |
| Oil and gas technology | 3 |
| Optics branch of physics | 3 |
| Physics | 8 |
| Psychiatry | 5 |
| Quantum mechanics | 1 |
| Radio | 38 |
| Security systems | 2 |
| Shipbuilding | 2 |
| Spectroscopy | 2 |
| Statistics | 1 |
| Surveying | 4 |
| Technology | 58 |
| Trucks/Lorries | 2 |
| United Nations | 1 |
| Veterinary medicine | 3 |