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of unknown cause (Min$draV); 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); for some unknown reason (lexicographer) | |||
| inexplicably (A.Rezvov) | |||
| by unknown cause (Sakhalin Energy) | |||
| по неизвестной причине: 3 phrases in 3 subjects |
| Aviation | 1 |
| Microsoft | 1 |
| Psychology | 1 |