官价

duō shù guó jiā cǎi yòng dān yī huì lǜ zhì yī qiè wài huì jiāo yì àn guān jià huì lǜ jìn xíng jié suàn

多数国家采用单一汇率制，一切外汇交易按官价汇率进行结算。

Most countries adopt single-rate systems in which all foreign exchange transactions are carried on at one official rate of exchange.