传统上，IMF要求两个标准：货币发行国必须是世界领先的出口国；并且该货币必须“可自由使用 ” — —即被广泛使用和交易。
Traditionally, the IMF has insisted on two criteria: a currency’s issuing country must be among the world’s leading exporters, and the currency must be “freely usable” – widely used and traded.