poor muscle tone in the tongue and throat. Muscles that are too relaxed contribute to snoring.

舌头和咽喉的肌肉松弛会导致打鼾。

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Snoring is caused by a few things, but the biggest culprit is a vibration of very relaxed muscles and tissues in the throat, which rattle against narrow breathing passages.

打呼是有几方面的因素造成的，但是罪魁祸首是喉管内过份松弛的肌肉和组织，在狭窄的呼吸道内发出声响。

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In addition, muscle groups in the throat and neck may be contracted or relaxed to decelerate or accelerate forced airflow created by the respiratory muscles.

此外，颈部和喉部的肌肉群也会收缩或者放松来减慢或加快呼吸的速度。

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It may also be helpful to avoid certain drugs such as sleeping pills or other sedatives and alcohol, which can all make the area around the throat relaxed and somewhat floppy while sleeping.

CNN: How can someone stop or reduce snoring?