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高效型 : 13 phrases in 10 subjects |
| Automobiles | 2 |
| Chemistry | 1 |
| Electronics | 1 |
| General | 1 |
| Oil / petroleum | 1 |
| Pharmacology | 1 |
| Plastics | 1 |
| Polymers | 2 |
| Space | 1 |
| Technology | 2 |
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