英语 ⇄ 俄语

two-tier rate of exchange 强调
一般	двойной валютный курс ('More)
政治	двойной курс валюты (ssn)
经济	двойной курс (e.g. On July 31, 1989, a two-tier exchange rate system was established, comprising an official and free market exchange rates.); двойной курс