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复合盐 : 24 phrases in 10 subjects |
| Agriculture | 3 |
| Automobiles | 2 |
| Aviation | 1 |
| Chemistry | 1 |
| Electronics | 1 |
| General | 3 |
| Pharmacology | 2 |
| Polymers | 3 |
| Technology | 5 |
| Water resources | 3 |
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