It is an acute inflammatory condition confined to supraglottic structures which include epiglottis, aryepiglottic folds and arytenoids.

急性炎是一种急症态，主要累喉部声门上区的围组织（包谷、杓襞和杓软骨等。

Strung between the thyroid and arytenoid cartilages, these two muscles form an elastic curtain that opens and shuts across the trachea, the tube that carries air through the throat.

这两块肌肉串在甲腺软骨和杓软骨之间，形成了一个弹性幕布，可以打开和关闭气管，气管是输送空气通过喉咙的管道。