And then in the seventh century we had money in the form of precious metal. There was always a problem of making sure that the coin that you got had enough precious metal in it to give it a value. When things got tough, you often found some civilisations were quite good at what they called sweating the money, which was effectively taking out the precious metal content so that what you got actually wasn't what you thought you got.

    另外在七世纪时出现了贵重金属货币。但如何确切知道货币中有足够的贵重金属含量以使它具有相应的价值则一直是个问题。当时局艰难时，一些文明古国会从这种货币中提取贵重金属成份，使得货币已不再拥有你原来以为它拥有的价值。

    And we have a form of that here in Australia when we had the holey dollar ... when we had a coin with a hole in the middle because there was a shortage of metal.

    澳大利亚就曾有过一种这类的货币，一种中间有个洞的货币。这是由于当时缺乏铸币金属的缘故。

    And in those days, Spanish coins were used a lot. Sometimes stores used certain tokens because there was a shortage of actual coinage. And then there is money as we know it today in notes and coins - plastic notes.

    那时候西班牙硬币广为流通。有时商店里因为没有足够的硬币而使用一些代用币。后来就有了我们现在使用的纸钞、硬币，还有塑料钞票。

And of course, if we were doing this program in a hundred years time we might talk about quaint little things called money, notes and coins, because all we'd be using would be plastic card.

    当然，如果我们在一百年之后再来制作这一节目，我们可能就会谈论一些奇特有趣的叫做钱、纸币或是硬币的小东西，因为到那时我们大概只使用塑料卡了。