Foreign Exchange

问题描述:

Foreign Exchange
Centuries ago,when gold coins exclusively were used as the money of nations and city-states,the comparative value each nation's money was determined by the ratio of the gold content of each coin.

远古时期,金子已经是国家和各个地区的通用货币了.
而每个国家地区的货币的相对价值量是由货币本身的含金量决定的.
自己翻的,不是直翻.