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| 发育中心 | |||
| center of development: 13 phrases in 9 subjects |
| Aviation | 1 |
| Ecology | 1 |
| Economy | 1 |
| Electronics | 2 |
| Environment | 1 |
| General | 1 |
| Space | 3 |
| Technology | 2 |
| Textile industry | 1 |
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