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| 层耕: 68 phrases in 10 subjects |
| Agriculture | 36 |
| Animal husbandry | 3 |
| China | 1 |
| Desert science | 4 |
| Earth sciences | 4 |
| General | 1 |
| Hydroelectric power stations | 2 |
| Management | 1 |
| Soil science | 4 |
| Technology | 12 |
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