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转 每秒 : 25 phrases in 11 subjects |
| Automobiles | 1 |
| Aviation | 2 |
| Earth sciences | 2 |
| Electric machinery | 2 |
| Electronics | 5 |
| General | 1 |
| Information technology | 1 |
| Mechanics | 3 |
| Plastics | 1 |
| Space | 2 |
| Technology | 5 |
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