Another popular method is to buy historic or mint gold COINS that, due to their collectable nature, have a value greater than their pure precious metal content.
另一个比较流行的方式就是购买历史性的或者数量巨额的金币，由于他们具有的收藏价值，他们往往高于自身金属含量的价值。
The few lead content is beneficial in the precious metal cyaniding, but the high lead content in the gold concentrate roasting-cyaniding is harmful.
少量的铅含量在贵金属的氰化提金工艺中是有益的，但铅含量过高在金精矿的焙烧—氰化提金过程中是有害的。
Gresham observed that COINS with a higher content of gold and silver were kept rather than being used in exchange, or were melted down for their precious metal.
格雷欣注意到人们把金银含量高的硬币保存起来而不来于交换，或者将其熔化提炼其中的贵重金属。
Gresham observed that COINS with a higher content of gold and silver were kept rather than being used in exchange, or were melted down for their precious metal.
格雷欣注意到人们把金银含量高的硬币保存起来而不来于交换，或者将其熔化提炼其中的贵重金属。
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