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| extend boundaries; expand the boundaries (Andrey Truhachev) | |||
| stretch the envelope (to extend the boundaries, to expand one's horizons: I've set some goals that stretch my envelope – challenge me Taras) | |||
| alter boundaries; draw boundaries | |||
| extend boundary | |||
| расширить границы: 5 phrases in 3 subjects |
| General | 1 |
| Idiomatic | 1 |
| Makarov | 3 |