The ratio of the silver-109 isotope to silver-107 turned out to be much higher in New World silver than in the European COINS.

109同位素银和107同位素银在新世界银的比例要比来自欧洲的银币高很多。

youdao

The People's Bank of China (PBOC), the country's central bank, will issue a set of gold and silver commemorative coins this month to celebrate the upcoming World Expo 2010 Shanghai.

中国银行将发行一套金银纪念币，以庆祝即将到来的上海世博会。

youdao

Sikeliote craftsmen became the masters of the ancient world at carving microscopically detailed dies from which gold and silver coins were stamped in a great variety of intricate images not just of gods and humans, but of flying four-horse chariots and great eagles devouring their prey.

WSJ: Sicily's Proud Past | Sicily: Art and Invention Between Greece and Rome | J. Paul Getty Museum By David Littlejohn