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| 每单位时间 | |||
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per unit time : 30 phrases in 11 subjects |
| Agriculture | 8 |
| Air defense | 1 |
| Business | 2 |
| Earth sciences | 3 |
| Economy | 2 |
| Electronics | 2 |
| General | 1 |
| Geophysics | 1 |
| Metallurgy | 2 |
| Space | 1 |
| Technology | 7 |
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