the part of a shoe or stocking that covers the arch of the foot
例句
用作名词 (n.)
Lie on his back on the floor, double leg stretchs tight straight, instep bends. 仰卧在地板上，双腿绷直，脚背弯曲。
Meanwhile, Alonso suffered discomfort after what was his first start since requiring seven stitches on his instep on Monday. 同时，在周一踢完埃弗顿的比赛后，脚背缝上七针的阿隆索感到脚部的不适。
美
['ɪnstep]
