#分配氣體
#Distribute Gases
不對稱的洞穴開口產生被動通風 (Asymmetric burrow openings create passive ventilation)
黑尾草原犬鼠巢穴洞口的位置和形狀差異使氣壓改變，透過風能產生被動性通風
(Differences in position and shape of burrow openings of black-tailed prairie dogs create passive ventilation from wind energy by altering air pressure.)
