Because the police had some of the man's wavy black locks, with roots intact, the scientists could subject them to C-14 dating as well.

因为警方掌握该名男子的一束波浪状黑发，且发根完整无损，科学家们可以把头发一起用作碳14测定。

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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.

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。

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