Most people judge currencies on a relative basis. This is a very poor measure of the value of a currency since it doesn't take into account the total destruction of paper money in the last 100 years.
大多数人都用相对价值来看待货币，这种方式完全没有考虑到过去一百年货币的大贬值。
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It is calculated as a ratio of the money gained or lost on that investment relative to the amount ofmoney invested, and is typically stated as a percentage rather than as a dollar value.