因为其前后肢上都存在着较长的羽翮，因此徐星将它称之为“四翼”恐龙。
Xu calls it a "four-winged" dinosaur because it had long, pennaceous feathers on its arms and legs.
最终，成行的浓密互连羽支形成了平滑表面：即现代鸟类的羽翮结构基本形成。
Eventually, dense rows of interlocking barbs formed a flat surface: the basic blueprint of the so-called pennaceous feathers of modern birds.
应用推荐