The finding implies that their hosts, both mammals and birds, had also begun to flourish and speciate before the reign of the dinosaurs was over.

这项发现也隐隐地证明虱子的哺乳类和鸟类宿主在恐龙统治结束之前已经开始繁盛并进化出新物种。

This procedure allows FDA microbiologists to optimize the recovery of all potential pathogens and to quantitate and speciate all recovered organisms.

该方法使得FDA微生物学家可以最大化回收所有可能的病原体，并对回收的微生物分类和定量。