air sac

音標發(fā)音

The invention provides a walking shielding air sac.
一種學步保護氣囊。
ip.com
In apes the hyoid attaches to a large pouch called an air sac, that makes sounds bigger and deeper.
猿的舌骨依附於一個很大的喉囔，科學家稱之爲氣囊，它可以讓聲音更大、更深沉。
Homo erectus of a million years ago also likely had an air sac. But we don't – and nor did Neanderthals.
一百萬年前的直立人很可能有氣囊，但現(xiàn)在的我們沒有，過去的尼安德特人也沒有。

a space filled with air that continues from a bird's lungs into one of its bones or another body area, used in breathing

any of the membranous air-filled extensions of the lungs of birds, which increase the efficiency of gaseous exchange in the lungs