A strong rouble undermines Russia's exports and public finances, a headache for the government, which is mooting whether to set an " optimal" exchange rate.

强势的卢布削弱了俄罗斯的出口和公共财政，这对俄罗斯政府来说是一个头疼的问题，该政府正在讨论是否设定一个“最优”汇率。