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| 边缘区: 52 phrases in 25 subjects |
| Advertising | 1 |
| Agriculture | 3 |
| Automobiles | 1 |
| Aviation | 1 |
| Business | 2 |
| Commerce | 1 |
| Desert science | 4 |
| Drilling | 1 |
| Earth sciences | 2 |
| Ecology | 1 |
| Economy | 1 |
| Electronics | 1 |
| Engineering geology | 1 |
| Finances | 1 |
| General | 2 |
| Geology | 2 |
| Golf | 1 |
| Hydroelectric power stations | 1 |
| Management | 1 |
| Multimedia | 1 |
| Nursing | 2 |
| Oil / petroleum | 5 |
| Space | 1 |
| Technology | 14 |
| Wind Energy | 1 |
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