Peruvian bark was good at relieving ague symptoms, but really expensive, and he thought willow might work as a cheaper alternative.

秘鲁树皮可以缓解瘟疫症状，但非常昂贵，他认为柳树可能是更便宜的替代品。

His concoction wasn't as powerful as Peruvian bark, which was a source of quinine a compound that actually kills the malaria parasite.

他的混合物没有秘鲁树皮那么强大，秘鲁树皮是奎宁的来源，奎宁是一种可以杀死疟原虫的化合物。

During a particularly nasty outbreak of ague, a fever thought to be caused by malaria, Stone noticed that willow bark tasted an awful lot like Peruvian bark, the more common ague treatment of the time.

在一次特别严重的瘟疫爆发期间，一种被认为是由疟疾引起的发烧，斯通注意到柳树皮尝起来很像秘鲁树皮，秘鲁树皮是当时更常见的瘟疫治疗方法。