1. 脚踝：它将鞋底(sole)通过带子(straps)或者夹柱(thongs)通过足弓(instep)和脚踝(ankles)固定在脚上. 有时候凉鞋和其它种类的鞋区别不明显,但一般认为凉鞋暴露脚的大部分,特别是脚趾(toes). 穿凉鞋有很多好处,

2. 都是指：them 都是指 ankles) | The pain in his left foot is accompanied by redness and swelling. (左脚酸痛,并有红肿... | The joints near his fingernails and knuckles look swollen. (指头和指节旁边的关节,似乎有肿...