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1·At pharyngeal recess level, parapharyngeal space and parapharyngeal structure were observed and measured in the width and area with vernier caliper and associate pane.

在经咽隐窝的断面上，观察咽旁间隙及咽旁结构的解剖学关系，利用游标卡尺及关联方格分别测量其宽度和面积。