A small puff of air , now come on !
很轻的，来吧！
Now , you 'll feel a small puff of air in each eye .
现在会有点风吹到你的眼睛上。
Humans blink their eyes in response to a puff of air directed towards them .
人们会眨眼作为对一小股空气吹向他们的眼睛的反应。
And all of this from a puff of air emanating from our mouths .
这一切只因为口吐一口气而已
puff of airpuff of airpuff of air