周长

• The column measures two feet around .
  这根柱子周长2英尺。
• The circle has greater area than a regular poiygon of the same perimeter .
  圆的面积比同样周长的正多边形的面积大。
• The circle has greater area than a regular polygon of the same perimeter .
  圆的面积比同样周长的正多边形的面积大。
• In each case an integral number of wavelengths fit into the circumference of the loop .
  在各种情形下，环的周长都等于波长的整数倍。
• the circumference of the circle is 2πr and the time for one revolution is 2πr/v.
  圆的周长是2r，转一圈的时间是2rv。
• The best of the early measurements of the earth's circumference was made by eratosthenes .
  早期测量地球周长的最准确结果是由埃拉托斯特尼得出的。
• The thickness of the bark and girth of the tree can influence the shape and nature of galleries and chambers .
  不过树皮厚度和树的周长都会影响到虫道和蛹宝的形状与特征。
• Wheel circumference measurements are show in cms
  车轮的周长以厘米为单位度量。
• The earth ' s circumference is more than 40000 kilometres
  地球的周长为四万多公里。
• Work out how long the perimeter of the playground
  请你算一算体育场的周长是多少米？