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| неизвестное происхождение | |||
| неизвестной этиологии (Dimpassy); неясная этиология (neuromuscular.ru dimock) | |||
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unknown origin : 17 phrases in 8 subjects |
| Aviation | 1 |
| Chemistry | 1 |
| Equestrian sports | 1 |
| Makarov | 1 |
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| Psychology | 1 |