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| English | Russian |
| be a fly on the wall | быть тайным свидетелем (происходящего Баян) |
| be a fly on the wall | быть молчаливым наблюдателем (Баян) |
| fly on the wall | незаметный наблюдатель (One who is able to observe something closely but invisibly and without interfering in the situation. I would love to be a fly on the wall in John's house when he finds out his wife bought a new car without telling him. VLZ_58) |
| on the fly | не останавливаясь (Taras) |