perimeter
柯林斯词典
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。
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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。