一股气流：短暂的、轻微的气流或呼吸。
The doctor may use the otoscope to blow a little puff of air in your ear. Why?
医生可能会使用耳镜向你耳朵中吹一小股气，为什么呢？
A simple puff of air will send the rotor blade spinning and get the LED lights glowing.
简单的空气粉扑将发送转子叶片旋转并获得LED灯发光。
Next, strangely enough, he blew a little 18 puff of air on it, as though it were dusty.
接着，说也奇怪，他对着宝石轻轻吹了一口气，好像上面沾了灰尘似的。
These use light waves to scan individual green beans, which are rejected by a puff of air if they show up as defective.
After several repetitions, the animals learned to blink after hearing the noise in anticipation of the puff of air, and they timed their blinks to avoid it.
The researchers played a sound and then, after a set period of time that varied between each group, blew a puff of air into the rats' eyes, making them blink.