| 释义 |
per·im·eterBrE /pəˈrɪmɪtə(r)/ NAmE /pəˈrɪmɪtər/ noun the outside edge of an area of land （土地的）外缘，边缘◆ Guards patrol the perimeter of the estate . 保安人员在庄园四周巡逻。◆ a perimeter fence /track /wall 围绕四周的栅栏/小径/墙(mathematics数学) the total length of the outside edge of an area or a shape 周长 ➡ compare circumference |