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排列环 : 26 phrases in 13 subjects |
| Agriculture | 2 |
| Automobiles | 1 |
| Aviation | 1 |
| Business | 3 |
| Computers | 1 |
| Economy | 1 |
| Explosives and Explosive Ordnance Disposal | 2 |
| General | 1 |
| Genetics | 2 |
| Metallurgy | 2 |
| Oil / petroleum | 1 |
| Space | 2 |
| Technology | 7 |
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