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it's been proven (что; that; so it has been shown to be true Val_Ships) |
было доказано: 51 phrases in 10 subjects |
British usage, not spelling | 1 |
General | 19 |
Horticulture | 2 |
Informal | 1 |
Law | 1 |
Literature | 1 |
Makarov | 14 |
Mathematics | 5 |
Scientific | 6 |
Technology | 1 |