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| 低 地: 240 phrases in 29 subjects |
| Astronautics | 1 |
| Automobiles | 1 |
| Aviation | 5 |
| Business | 3 |
| Corporate governance | 1 |
| Ecology | 2 |
| Education | 2 |
| Electronics | 3 |
| Figurative | 1 |
| Fish farming pisciculture | 1 |
| General | 142 |
| Geology | 13 |
| Hydrology | 1 |
| Mammals | 1 |
| Medical | 2 |
| Military | 4 |
| Mining | 1 |
| Nautical | 2 |
| Oil / petroleum | 1 |
| Oil processing plants | 1 |
| Oilfields | 2 |
| Ornithology | 1 |
| Pest control | 1 |
| Road works | 1 |
| Seismology | 2 |
| Technology | 41 |
| United Nations | 1 |
| Water resources | 2 |
| Zoology | 1 |
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