同样，呼吸道及气管有衬里的表面细胞及腺体产生的粘液和其它液体。

Likewise, airway and windpipe linings have surface cells and glands that produce mucus and other fluids.

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同样，呼吸道及气管有衬里的表面细胞及腺体产生的粘液和其它液体。

Likewise, airway and windpipe linings have surface cells and glands that produce mucus and other fluids.

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