趣談?dòng)⒄Z：奧林匹克金牌不是純金-Olympic Gold Medals Are Made Of Silver
host country: the nation that holds the event
IOC: International Olympic Committee
composition: what something is made of
gold-plated: containing a layer of gold on the surface
monetary value: the amount something is worth
Gold Medals Are Made Of Silver-奧林匹克金牌是用銀做的
Winning a gold medal in the Olympics is a reward like no other. But are the medals really made out of gold? Not entirely. Solid gold medals are very expensive, and have not been awarded to Olympians since 1912. Since then, Olympic gold medals have only contained a small percentage of gold. While the design of the medal is determined by the host country, the IOC does maintain some rules about the metal composition. The gold-plated gold medals are made mainly of silver, but must contain a minimum of 6 grams of gold. The monetary value of the 2014 gold medals was approximately $550 US dollars.
