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| 下 向流: 50 phrases in 13 subjects |
| Agriculture | 2 |
| Automobiles | 1 |
| Desert science | 1 |
| Economy | 1 |
| Energy industry | 1 |
| Engineering geology | 1 |
| General | 3 |
| Metallurgy | 14 |
| Oil / petroleum | 1 |
| Securities | 1 |
| Skydiving | 10 |
| Technology | 13 |
| Water resources | 1 |
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