Another site produced Omo II, which has more of a skull but no skeletalbones.
另一个地点,产生更多奥莫低谷位于图阿二世的头骨,但没有骷髅骨头。
2
They share many skeletal features, such as hollow bones, as well as feathers and nest-building behaviors.
他们有许多相同的骨骼特征,例如中空的骨头,也都有羽毛和筑巢行为。
3
To distribute stress uniformly, trees add wood at the heaviest load points. Bones remove material from areas where it isn't needed to lighten skeletal frameworks.