periphery
noun [ C usually singular ] uk/pəˈrɪf.ər.i/ us/pəˈrɪf.ɚ.i/
外围，周边
the outer edge of an area
Houses have been built on the periphery of the factory site. 厂区的周边地区盖起了房子。
The ring road runs around the periphery of the city centre. 环路绕行市中心的外围。
（某一团体或活动的）次要部分，边缘
the less important part of a group or activity
Many women feel they are being kept on the periphery of the armed forces. 许多妇女感到她们在武装部队中被边缘化了。