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和阶 : 33 phrases in 10 subjects |
| Economy | 1 |
| Education | 5 |
| Electronics | 1 |
| General | 18 |
| Mathematics | 1 |
| Name of organization | 2 |
| Quantum electronics | 1 |
| Socialism | 1 |
| Space | 1 |
| Technology | 2 |
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