在18件样本上检测了氧和锶的同位素。这两种元素在牙齿成型时，会固定在牙釉质上。
Oxygen and strontium isotopes, which are fixed in dental enamel at the time of tooth formation, were tested in 18 subjects.
对这些珐琅碎片进行金属元素锶的同位素测试，这种元素可以揭示出个体所成长的地理区域。
These fragments were then analysed to test for particular isotopes, or forms, of the metallic element strontium, which can reveal the geological region where individuals were raised.
依据是在一个地质区域内主要的锶同位素在被生活在该地的个体消化以后会被融进牙齿的釉质中。
This is because particular isotopes of strontium dominant within a geological region are digested by individuals living there and incorporated into their tooth enamel.
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