用特异化学标记的短链DNA取代了混有稀土的复合物，每一个链有不同顺序的基因编码。
In place of combinations of rare-earth compounds, its unique chemical markers are short stretches of DNA, each with different sequence of genetic code.
为了解决这个问题，研究者们正在希望用含铈的稀土[钼系]元素合金来作为替代品。
To solve the problem, researchers are hoping to replace them with "mischmetal" alloys.
矿工们挖去表层土，然后把这些闪着点点金光的粘土铲进一个灰坑内，用酸来提取出稀土矿。
Miners scrape off the topsoil and shovel golden-flecked clay into dirt pits, using acids to extract the rare earths.
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