然而，当研究人员将两项技术一并运用于牙齿上，他们意识到外消旋化提供了一个额外的有用细节，能成为个体死亡年龄的良好衡量标准。

However, when the researchers applied both techniques to teeth, they realized that the racemization offered an additional useful detail, a good gauge of an individual's age at death.

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顺便说一下，如果你好奇为什么在判断牙齿年龄方面、外消旋化会比碳14定义的时钟精度差之甚多，那么部分原因与温度相关。

By the way, if you're curious about why racemization is so much less accurate a clock than C-14 for dating a tooth's age, part of the explanation has to do with temperature.

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因此，倘若尸身被置于火场中，会完全扭曲外消旋化技术所判断的牙齿外观年龄——尸身被置于沙漠也同理。

So being in a fire will totally distort a tooth's apparent age via this technique - as might being left in a desert.

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