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| 树干解析 | |||
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tree analysis : 38 phrases in 15 subjects |
| Automobiles | 2 |
| Aviation | 4 |
| Business | 4 |
| Communications | 1 |
| Earth sciences | 2 |
| Economy | 2 |
| Electronics | 1 |
| Forestry | 1 |
| Information technology | 1 |
| Management | 1 |
| Nautical | 1 |
| Oil / petroleum | 2 |
| Reliability | 2 |
| Space | 3 |
| Technology | 11 |
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