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| Russian | English |
| по неизвестной причине | for whatever reason (Unfortunately, for whatever reason, the victim did not come forward. • The image became synonymous with the notion that the 'spaceman' was an alien visitor that, for whatever reason, was invisible in person but which showed up in the photograph.'  unexplained-mysteries.com ART Vancouver) |
| по неизвестной причине | for some unknown reason (lexicographer) |
| по неизвестной причине | of unknown cause (Min$draV) |