| 单词 | air sac |
| 释义 | air sac air sac n.（名词）1. An air-filled space in the body of a bird that forms a connection between the lungs and bone cavities and aids in breathing and temperature regulation.气囊：鸟体内连结肺和骨穴的气囊，帮助呼吸和温度调节2. See alveolus 参见 alveolus 3. A saclike, thin-walled enlargement in the trachea of an insect.气囊：昆虫气管中囊状薄壁的扩张 |
| 随便看 |
英汉双解词典收录913115条英汉汉英双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。