您要查找的是不是：
- Teacher: What is the perimeter of a circle? 师：什么是圆的周长?
- Teacher: Express the way of calculating the perimeter of a circle by letters. 师：圆的周长的计算方法，用字母公式表示。
- Tell us which problems with the perimeter of a circle you can solve in your daily life. 举例说明你能解决生活中哪些圆周长的问题。
- Calculate the perimeter and the area of a circle skillfully. 熟练地进行周长和面积的计算。
- Guards patrolled the perimeter of the airfield. 卫兵沿机场四周巡逻。
- a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere). 从圆的中心到周界的直线（或从球体的中心到表面）。
- A fence marked the perimeter of the field. 一道篱笆标明了那块田地的周界。
- a straight line from the center to the perimeter of a circle,or from the center to the surface of a spher 从圆的中心到周界的直线，或从球体的中心到表面
- The perimeter of the airfield is protected by guard-dogs. 机场外的环形防卫圈由警犬保卫着。
- The axis of a circle is its diameter. 圆的轴线是其直径。
- the perimeter of a circle 圆的周长
- Review the knowledge about circles. Further study the names of all the parts of a circle and how to work out the perimeter and the area of a circle. 复习圆的有关知识,进一步熟悉了圆各部分的名称,以及圆周长和面积的计算方法。
- What is the perimeter of this oblong. （这个矩形的周长是多少?）
- What is the perimeter of this polygon? 这个多边形的周长是多少?
- The diameter and the circumference of a circle. 圆的直径和圆周相关联。
- An instrument that measures the area of a plane figure as a mechanically coupled pointer traverses the perimeter of the figure. 测面仪一种仪器，当机械连结的探针扫过平面图形的周线时能测出图形的面积
- He should have been the sun of a circle. 他本应该做一个周而复始的太阳。
- Gets the width, in pixels, of the sizing border drawn around the perimeter of a window being resized. 获取在正调整大小的窗口周围绘制的大小调整边框的宽度(以像素为单位)。
- Flat - A section of the perimeter of a wafer that has been removed for wafer orientation purposes. 平边-晶圆片圆周上的一个小平面,作为晶向定位的依据。
- Almost all the balls follow the shape of a circle. 几乎所有球类都呈圆形。
