基本释义
相关例句
5.This is a very rare 1866/5 silver half dollar, even rarer than the 1867 half dollar, one the 10 rarities of the Hong Kong regal coinage.
7.Originally, a valuable metal (gold, silver or copper) served as constant store of value, and even today the American dollar is technically"backed"by the store of gold which the US government maintains.
8.He talked about the gold standard that America was on, and that each dollar bill was actually a silver certificate.

