air sac
柯林斯詞典
1. N any of the membranous air-filled extensions of the lungs of birds, which increase the efficiency of gaseous exchange in the lungs (鳥類的)氣囊
返回 air sac
1. N any of the membranous air-filled extensions of the lungs of birds, which increase the efficiency of gaseous exchange in the lungs (鳥類的)氣囊