1. Including: money, length, time, weight, perimeter, area, volume and speed. 包括货币、长度、时间、重量、周界、面积、体积和速度。
2. Pi calculation program can be obtained after the input radius of the perimeter. 圆周率计算程序，这个程序可输入半径后求得周长。
3. The development of perimeter control of the checkerboard involved in structure topology optimization of multiphase materials is presented. 针对多相材料结构的拓扑优化出现的棋盘格问题，研究了周长约束控制方法。
英英解释
n.
1. the boundary line or the area immediately inside the boundary
2. a line enclosing a plane areas
3. the size of something as given by the distance around it
