求翻译：二型：就是指相近两个尺码的宽度差值为2毫米（如40码的鞋宽与是93毫米，那41码的鞋宽就会是95毫米），如今市面上大多数是此种型号的鞋（由其是运动鞋），普通没有标明型号的鞋，都属于此型号的。适用于脚正常比例的人。是什么意思？

II: two similar size refers to the width difference of 2 mm (eg 40 yards and is 93 mm wide shoes, wide shoes, that 41 yards would be 95 mm), most of such models on the market today shoes (by the sports shoes), the general did not indicate the type of shoes, all belong to this model. For normal foot