柯林斯词典perimeter /pəˈrɪmɪtə/ (perimeters) 1. N-COUNT The perimeter of an area of land is the whole of its outer edge or boundary. 周边; 周界 ...the perimeter of the airport. …机场周边。 返回 perimeter剑桥词典the outer edge of an area of land or the border around it 周边，边缘 Protesters cut a hole in the perimeter fence . 抗议者在周围的栅栏上砍出了一个洞。 A river runs along one side of the field's perimeter. 一条河沿这片田地的一侧流过。 mathematics specialized the length of the outer edge of a shape 周，周长 返回 perimeter