These are round bones within the eye socket that are present today in modern birds and many reptiles.

这些是现代鸟类和许多爬行动物眼窝内的圆形骨头。

" Kneecaps" (kneecaps) are small round bones found in the middle of your leg towards the front of the leg, above your " knee, " which is the part of the leg that bends.

“膝盖骨”（膝盖骨）是小圆骨，位于腿的中部，朝向腿的前方，在“膝盖”上方，这是腿部弯曲的部分。