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？

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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。

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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。

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These use light waves to scan individual green beans, which are rejected by a puff of air if they show up as defective.

ECONOMIST: Espresso coffee

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.

ECONOMIST: Neuroscience (2)

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.

ECONOMIST: Neuroscience (2)