He dug up old coins.

他挖掘到古老的钱币。

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Those old coins are almost valueless.

那些旧的硬币几乎没有什么价值。

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He has a large collection of old COINS.

他收藏了大量的古硬币。

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Recently his firm began converting scrap silver, whether it is jewelry, flatware or old coins such as pre-1964 U.S. quarters into pure silver.

FORBES: FOCUS: Little Scrap Silver Seen On Market After Run To $50

Those old coins in the bottom of your attic trunk just got marvelously valuable, if two full-page ads in the NY Times today is any proof.

FORBES: I Should Have Kept Those Buffalo Nickels

For instance, a five-year-old must recognize different coins while a 13-year-old must create a budget, says Suzanne Harper, the Girl Scouts' director of program resources.

WSJ: Making Young Kids Smarter About Finance