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| periodic solution | |||
| periodical solution | |||
| 周期解: 14 phrases in 8 subjects |
| Agriculture | 2 |
| Business | 1 |
| Finances | 1 |
| Genetics | 1 |
| Life sciences | 1 |
| Metallurgy | 2 |
| Space | 1 |
| Technology | 5 |
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