The option buyer has the right to demand purchase or sale of a specified currency, but no obligation to do so.

期权的购买者，有要求购入或卖出某种货币的权利，但没有义务。

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DBMONEY: the currency symbol for the money column values in the external data file are in the format specified by the DBMONEY.

DBMONEY：外部数据文件中的货币列值的货币符号采用由DBMONEY指定的格式。

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If no currency is specified, if the Reference Entity is not a Sovereign, then the relevant currency is that of the jurisdiction in which the relevant Reference Entity is organized.

如果没有指定的货币，如果该参考实体是不是一个主权货币，则是，管辖权在有关参考实体组织的有关货币。

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Paper currency began as warehouse receipts for specified weights of gold or silver.

FORBES: Rethinking Money: The Rise Of Hayek's Private Competing Currencies

This is so because legal tender laws allow debtors to effectively abrogate private currency debt contracts at will by offering Federal Reserve notes in lieu of what was specified.

FORBES: Private Currency Competition Is The Monetary Answer

The local currency could be devalued based on an agreed upon schedule or allowed to float within a specified range in order to restore competitiveness and economic growth in the local market.

FORBES: To Save the Euro, Establish Dual Currencies