Animal experts in Vietnam are using the eDNA to find the last, wild Yangtze giant softshell turtles.

越南动物专家使用eDNA来寻找最后的野生斑鳖。

In Yosemite, researchers used eDNA to track and remove invasive bullfrogs.

在优胜美地国家公园，研究者用环境 DNA 来追踪和清除入侵的牛蛙物种。

Using eDNA, scientists are able to investigate complex ecosystem interactions.

通过使用环境 DNA，科学家们能够调查复杂的生态系统之间的相互作用。

For the study, researchers examined environmental DNA, also known as eDNA, from soil samples.

在这项研究中，研究人员检查了土壤样本中的环境DNA，也被称为eDNA。

Without seeing the cat, scientists had proof it was there because of environmental DNA or eDNA.

在没有肉眼观测到其出现的情况下，科学家们仍能断定它的存在，归功于环境 DNA，也就是 eDNA。

But until recently, eDNA wasn't very useful to us.

但是环境 DNA 直到最近方为我们所用。

Scientists have also used eDNA sampling as a tool to study sea life like whales and sharks.

科学家还将eDNA水样作为研究鲸鱼和鲨鱼等海洋生物的工具。

Laura Epp, who was not involved in the study, is an eDNA expert at Germany's University of Konstanz.

劳拉·埃普没有参与这项研究，她是德国康斯坦茨大学的环境DNA专家。

So in many contexts, eDNA is useful for telling us about the recent past.

因此，在多数情况下，环境 DNA 对我们了解近期活动起到十分重要的作用。

Well, this edna has got to be stopped.

我们要阻止这个爱德娜。