| |||
be inaccessible to like a sealed book | |||
under lock and key (The reliefs were discovered in 1962 but have been kept under lock and key ever since and have never gone on public display before. ArcticFox); behind seven seals (locked behind seven seals Alexander Demidov) | |||
top-secret |
за семью печатями: 21 phrases, 6 sujets |
Bible | 2 |
Général | 12 |
Idiomatique | 3 |
Informel | 2 |
Livre/littéraire | 1 |
Makarov | 1 |