进化论的作者、年轻的英国植物学家查尔斯·达尔文，是第一个看到落叶柏树干圆周长达一百三十英尺的欧洲人。
A young English botanist named Charles Darwin, the author of the theory of evolution, was the first European to see alerces, with trunks that had a circumference of 130 feet.
那是因为，至少在圆周长度方面，我们星球上的一些地方比其他的要大。
That's because some parts of the planet are much bigger than others, at least in circumference.
这一环形交叉的圆周长度大约是3.4公里，环绕交叉的道路是波斯兰苏丹萨拉赫丁阿卜杜勒阿齐兹沙阿路。
The circumferential length of this roundabout is approximately 3.4km, and the road that circumvents it is Persiaran Sultan Salahuddin Abdul Aziz Shah. (Link).
pai是一个数学常量，代表圆周长跟直径的比值。
It's a mathematical constant representing the ratio of any circle's circumference to its diameter.
地球的圆周长约为两万五千英里。
腰部圆周最大部分的周长，同时保持卷尺水平。
The circumference around the biggest part of the waist, while keeping the measuring tape horizontal.
给出了由已知主管相贯线处直径确定分支管直径和椭圆周长或反向求解的计算公式，讨论了精度。
The formula to calculate the diameter of branch pipes and ellipse girth was given when the diameter of main pipe is known or reverse to resolve, discussed calculation accuracy.
从场地规则角度看，弯道对径赛成绩的影响，一是运动员实跑路线的圆周长；二是运动员曲线运动时产生的离心力。
Seen from the Angle of the rules of Sports ground, curve has an influence on results of track events.
从场地规则角度看，弯道对径赛成绩的影响，一是运动员实跑路线的圆周长；二是运动员曲线运动时产生的离心力。
Seen from the Angle of the rules of Sports ground, curve has an influence on results of track events.
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