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分级标准 : 43 phrases in 13 subjects |
Agriculture | 2 |
Automobiles | 1 |
Chemistry | 1 |
Corporate governance | 1 |
Earth sciences | 2 |
Fish farming pisciculture | 1 |
General | 1 |
Name of organization | 1 |
Nursing | 1 |
Soil science | 9 |
Technology | 18 |
Textile industry | 4 |
Winemaking | 1 |