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| total acid | |||
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总酸 : 48 phrases in 11 subjects |
| Animal husbandry | 5 |
| Automobiles | 1 |
| Ecology | 3 |
| Electronics | 1 |
| Food service and catering | 2 |
| General | 1 |
| Oil processing plants | 1 |
| Space | 1 |
| Sports | 3 |
| Technology | 24 |
| Water resources | 6 |
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