它很容易提取，因为它是在细胞核之外、叫做线粒体的结构里被发现的少量基因之一。

It is easily extracted, because it is one of a handful of genes found outside the cell nucleus, in structures called mitochondria.

youdao

细胞核 DNA 成功地从一只1.3万年前的鸸鹋蛋壳和一只巨大的恐鸟蛋壳中被提取出来了。

Nuclear DNA was successfully extracted from a 13,000-year-old emu eggshell and a giant moa eggshel.

youdao

从一只13，000年前的鸸鹋蛋蛋壳和一只恐鸟蛋中也成功提取出了细胞核DNA，这件工作依靠骨骼化石样本是很难完成的。

Nuclear DNA was also successfully extracted from a 13,000-year-old emu eggshell and a giant moa eggshell – something has proved difficult with fossil bone samples.

youdao