| 单词 | perimeter |
| 释义 | perimeter¹ 1.(boundary)周边；外缘；边缘 the posts that marked the camp's perimeter标示营地边界的柱子 the perimeter of the airport机场四周 A security perimeter of concrete blocks and barbed wire has been set up.用水泥板和带刺铁丝网搭建起了安全围栏。 2.【数】(enclosing plane area)周(线) the perimeter of the square正方形的四周 3.【数】(length)周长 4.【医】视野计 A perimeter is used to measure peripheral vision.视野计用于测量周边视力。 perimeter²周围的；周边的 a perimeter patrol周边巡逻 |
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