闭孔肌器官性构造，如软腭，用以关闭身体开口。
An organic structure, such as the soft palate, that closes an opening in the body.
坐骨神经经过骨盆上称为坐骨大孔的开口，通常走行于梨状肌的下方，因此梨状肌的疾患或痉挛或导致与坐骨神经痛症状相似的腿痛。
The sciatic nerve travels through an opening in the pelvis called the greater sciatic foramen, and typically runs below the piriformis muscle.
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