在这块骨头和小腿骨之间的是一个天然的凹槽，被称为“跗骨窦”，它决定了脚踝的灵活性。
Between this and the lower leg bone is a natural recess known as the sinus tarsi, which allows ankle flexibility.
跗骨窦的大小i因人而异，正是它决定了你的脚踝可以活动的范围，和你理想的鞋跟高度。
The size of the sinus tarsi varies from person to person and it is this that determines how much your ankle can move - and your ideal heel height.
飞节和后跗骨位于髋关节下方的一条直线上。
The hock joint and metatarsals lie in a straight line below the hip joint .
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