1、The pneumatization of bones is an adaptation that allows for lighter weight and increased buoyancy in certain animals, such as birds.
骨骼的充气化是某些动物（如鸟类）为减轻体重和增加浮力而进行的适应性改变。

2、Sinus pneumatization refers to the process of the sinus cavities in the skull becoming filled with air.
鼻窦充气化是指头骨中鼻窦腔被充满空气的过程。