如果某些翼手龙身上的“绒毛”被证实的确为羽毛的话，那羽毛的起源就可以上溯到更为远古的年代。
If the "fuzz" on some pterodactyls is indeed confirmed to be feathers, the origin of feathers can be traced back to more ancient times.
如果某些翼手龙身上的“绒毛”被证实的确为羽毛的话，那羽毛的起源就可以上溯到更为远古的年代，因为翼手龙与恐龙共同拥有某个更为古老的祖先。
The origin of feathers could be pushed back further still if the "fuzz" found on some pterosaurs is confirmed to be feathers, since these flying reptiles share an even older ancestor with dinosaurs.
一些基因和年代测定的研究指出远古美国人可能来自其他地方，而且比北美洲的克伦维斯人来的早。
Some genetic and time-dating studies point to the possibility that ancient Americans came from other places and arrived earlier than Clovis sites in North America.
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