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| вещь непостижимая (something as inaccessible to the understanding as a book that cannot be opened. WTNI Alexander Demidov); тайна за семью печатями (natasha396) | |||
| книга за семью печатями | |||
| sealed book: 10 phrases in 4 subjects |
| Bible | 1 |
| General | 6 |
| Informal | 1 |
| Makarov | 2 |