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成 灰 : 90 phrases in 12 subjects |
| Agriculture | 8 |
| Architecture | 3 |
| Automobiles | 5 |
| Desert science | 3 |
| Ecology | 1 |
| Engineering geology | 5 |
| General | 14 |
| Information technology | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 4 |
| Plastics | 1 |
| Technology | 44 |
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