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| not know beans (sas_proz); not know the first thing about something (в ч.-либо ParanoIDioteque) | |||
| not to know thing one about something (о чём-либо ad_notam) | |||
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| not to know the first thing about something (Taras) | |||
| ничего не смыслить: 9 phrases in 3 subjects |
| General | 4 |
| Informal | 2 |
| Makarov | 3 |