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| R'; real number system | |||
| 实数系统: 46 phrases in 12 subjects |
| Agriculture | 2 |
| Air defense | 1 |
| Aviation | 5 |
| Computers | 1 |
| Earth sciences | 12 |
| Electronics | 11 |
| Geophysics | 3 |
| Information technology | 2 |
| Missiles | 1 |
| Space | 4 |
| Technology | 2 |
| United States | 2 |
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