以下为句子列表：
英文: A potential shortage of coins in the United States could mean all those pennies in your piggy bank(1) could be worth five times their current value soon, says an economist at the Federal Reserve Bank of Chicago.
中文: 芝加哥联邦储备银行经济学家说，美国潜在的硬币短缺将使你存钱罐中的美分价值增长四倍。
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