Ms. Goldberg has used eDNA testing to confirm the local extinction, disappearance, of a leopard frog in the American state of Idaho.

戈德堡女士使用环境DNA测试来确认美国爱达荷州的豹蛙在当地是否已经灭绝。

So they tracked down four leopard frog populations with the unique call-including one within view of the Statue of liberty-and took DNA samples.

因此，他们研究了四种具有不同叫声的青蛙种类——其中包括自由女神区域的青蛙种类，并提取了它们的DNA样本。