——毒箭蛙身上鲜艳的色彩和标记，警告了食肉动物，它们与死亡之间的承诺；这个实现过程是很明确的。

The vibrant color and markings of the poison dart frog warns off predators with the promise of death; fulfillment here is clear.

youdao

这是生态学家安德鲁·布劳斯汀，他告诉我们，科学家们最近对可能造成几百万只蛙类和其他两栖类动物死亡的疾病有了更多了解。

That's ecologist Andrew Blaustein. He told us that scientists have recently learned more about diseases that may be killing millions of frogs and other amphibians.

youdao

这是生态学家安德鲁·布劳斯汀，他告诉我们，科学家们最近对可能造成几百万只蛙类和其他两栖类动物死亡的疾病有了更多了解。

That's ecologist Andrew Blaustein. He told us that scientists have recently learned more about diseases that may be killing millions of frogs and other amphibians.

youdao