They then found the same virus lurking in the genome of the three-toed sloth.
然后他们在三趾树懒的基因组中发现了同样的病毒。
2
Emu is a large Australian flightless bird, similar to the ostrich but with three-toed feet and grey or brown plumage.
鸸鹋是一种大型的澳大利亚不会飞的鸟，类似于鸵鸟，但是有三趾的脚和灰色或棕色的羽毛。
3
The four-toed Eohippus preceded the three-toed Miohippus, for example, but North American fossil evidence suggests a jerky, uneven transition between the two.