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| agnogenic; cryptogenetic; essential; noncausal; unexplained | |||
| cryptogenic (cryptogenus) | |||
| 原因 不明的: 9 phrases in 6 subjects |
| Animal husbandry | 1 |
| Dentistry | 1 |
| Economy | 3 |
| Reproductive biology | 1 |
| Soviet | 1 |
| Technology | 2 |
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