日本回收電子垃圾做奧運獎牌 被指卑鄙

How much metal is needed?

需要多少金屬？

The amount of metal needed will depend on the size and number of medals, since each year, they seem to get bigger and heavier.

所需的金屬數量取決於獎牌的大小和數量。每一年獎牌都在變得越來越大，越來越重。

Five new sports have also been added to the Tokyo 2020 competition, including baseball, karate, skateboarding, sport climbing and surfing.

2020年奧運會新加了五項運動，分別是棒球、空手道、滑板、運動攀巖和衝浪。

The 2016 Rio Olympics had the largest medals of any Games, weighing in at 500g each and 1cm thick in the middle.

2016里約奧運會的獎牌大小是有史以來最大的，重500克，中間厚1釐米。

The Brazilian Mint produced 5,130 medals in total, up from the 4,700 made by London's Royal Mint for the 2012 Games.

巴西鑄幣局總共製造了5130枚獎牌，超過了倫敦皇家鑄幣局爲2012年奧運會製造的4700枚獎牌。

How much will it cost?

花費多少？

It may end up being cheaper using recycled metals than buying it on the spot market.

使用回收的獎牌會比在現貨市場上買便宜。

A little-known fact is that the gold medals are mostly made out of sterling silver and the bronze metals are mostly made out of copper.

一個鮮有人知的事實是金牌大多是由標準純銀製成，銅牌則大多由青銅製成。

Isn't that rather sneaky?

這是不是有點“卑鄙”？

The IOC minimum requirement for a gold medal is 6g of the pure yellow metal.

國際奧委會對金牌的要求是至少要有6克的金。

If the medals were made of pure gold, the overall cost would run into tens of millions of dollars.

如果獎牌是純金的，那麼總花費將達到幾千萬美元。

Gold is currently about 70 times more expensive than silver. But some market experts think that may change by 2020.

現在金的價格比銀貴70倍。但是一些市場專家認爲到2020年形勢會有所變化。

Global silver reserves continue to shrink as demand is exceeding supply and we mine only 11oz of silver for each ounce of gold, said Gregor Gregersen, the founder of Silver Bullion in Singapore.

全球銀儲存量在逐漸減少，供不應求。新加坡Silver Bullion的創立者格雷格爾·格雷格森說，我們每挖出一盎司的金，只能挖出十一盎司的銀。