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| Russian | English |
| недоплатить пять рублей | underpay by five rubles |
| недоплаченная сумма | arrears (money that is owed and should already have been paid: "He ran into difficulties with his mortgage, building up more than £18,000 arrears. "The government is committed to the full and timely payment of its public debt and arrears. CBED Alexander Demidov) |