混入一些微量合金后，金币在理论上能贮藏几万年的时间。
Mixed with a small amount of alloy, gold COINS have literally been able to last for thousands of years.
大多硬币均由合金制造，比如黄金币和白银币通常含有一定的铜。
Most COINS are made of alloys. Gold and silver, for instance, are usually alloyed with copper.
大多硬币均由合金制造，比如黄金币和白银币通常含有一定的铜。
Most COINS are made of alloys. Gold and silver, for instance, are usually alloyed with copper.
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