inset
noun [ C ] uk/ˈɪn.set/ us/ˈɪn.set/
嵌入物
something positioned within a larger object
The map has an inset (= a small extra map) in the top corner that shows the city centre in more detail. 地图上角嵌有一幅小图，更详细地标示了市中心。
The long black wool coat has gold satin insets along its back and sleeves.