该疾病能够在不同的哺乳类物种之间传播。
The disease can spread from one mammalian species to another.
相对立的观点则认为哺乳类和鸟类在恐龙灭绝之后才成功并演化为各种不同的物种。
The opposing view is that mammals and birds did not become successful and radiate into many different species until after the demise of the dinosaurs.
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。
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.
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