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周每秒 : 33 phrases in 11 subjects |
| Agriculture | 1 |
| Automobiles | 1 |
| Commerce | 1 |
| Earth sciences | 7 |
| Electronics | 2 |
| General | 1 |
| Geophysics | 8 |
| Information technology | 1 |
| Space | 1 |
| Technology | 8 |
| Telecommunications | 2 |
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