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| incubator (indifference is injustice's incubator – The Jerusalem Post inna203); fertile ground (MichaelBurov); proving ground (breeding/fertile/proving ground – a situation in which something develops quickly or successfully Bullfinch) | |||
| благоприятная почва: 6 phrases in 3 subjects |
| General | 3 |
| Idiomatic | 1 |
| Makarov | 2 |