To most people, wearing shoes as the soles of your feet tread on the ground is the most natural thing in the world. But to people who have leg-length discrepancy, or diseased or unusual feet, it is often very difficult to find in a normal shoe store shoes that fit.
對大多數人來說，腳趿著鞋、腳板踩著地面行走，是再自然不過的事；但對於具有長短腳、病理腳、特殊腳的人而言，往往很難在市面上的鞋店找到一雙合腳鞋。