Before long they had collected millions of DNA fragments.

不久，他们就收集了数百万个DNA片段。

The scientists are also interested in how the DNA fragments managed to survive so long and defy expectations.

科学家们还感兴趣的是，这些DNA片段是如何存活这么长时间并超出人们的预期。

High-throughput sequencing then reads millions of these DNA fragments, simultaneously.

然后高通量测序同时读取数百万个这些 DNA 片段。

Analysis of short DNA fragments from a pair of samples collected in India and Bhutan matched that of an ancient polar bear bone.

此前研究人员对从印度和不丹收集的一对样本的短DNA片段进行了分析，他们发现这对样本与古代北极熊的骨骼样本相匹配。

In ancient human and animal remains, DNA fragments can easily be as short as 35 base pairs.

在古代人类和动物遗骸中，DNA片段很容易短至35个碱基对。