There was sound of snoring, of course.

当然也有人睡觉打酣。

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What usually happens is the airway collapses, causing blocked or shallow breathing, along with the sound of snoring.

经常发生呼吸道塌陷，导致呼吸道阻塞和呼吸的浅弱，并发鼾音。

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When that happens, air vibrates as it flows past the tissues in the back of the throat, which produces the snoring sound.

当堵塞发生时，空气流经咽喉的后部会引发振动，从而发出鼾声。

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As the body notices that it needs oxygen, it tries to take in a large amount of air, causing a gasping, snoring or snorting sound.

CNN: How can someone stop or reduce snoring?