Writing debts down in standard units serves one of the main functions of money: it lets you store value, or save up favors to cash in later.

它可以让你存储价值，或积攒好处以便以后兑现。

That wealth consists in money, or in gold and silver, is a popular notion which naturally arises from the double function of money, as the instrument of commerce, and as the measure of value.

财富在于货币，或在于金银，这是一个流行的概念，它自然产生于货币的双重功能，即作为商业工具和作为价值尺度。