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1.The pretracheal layer is a thin membrane that separates the trachea from the esophagus.
气管前层是一层薄膜，将气管与食管分隔开。
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2. During surgery, the surgeon needs to carefully remove the pretracheal layer to avoid damaging the trachea.
在手术中，外科医生需要小心地移除气管前层，以免损伤气管。
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3.The pretracheal layer plays a crucial role in maintaining the airway patency during sleep.
气管前层在睡眠期间维持气道通畅起着至关重要的作用。