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C14

C14

C14

C14

1

So this carbon dating, all it's really doing is measuring that. It gives a number for it.

这种碳同位素纪年的，实际上是测量 C14 的含量，测量给出一个数值。

2

C14 So it 's got some concentration of 14C that came from carbon dioxide in the atmosphere .

它获得，通过吸收空气中的二氧化碳。

3

Alcohols (C14-C18), primary , linear and essentially linear .

醇类（C14-C18 ），原生的，线性和本质线性。

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