地球的周长大约为25 000英里。
要将这个公式转换为一个表达式，你需要使用变量来记录半径及周长。
To translate this formula into an expression, you would use variables to record the radius and circumference.
他们发现自己被包围了，而巴黎的面积相当于当时或其他任何时候伦敦的三分之一，但它的周长很大。
They find themselves surrounded, and Paris is one-third the size of London at this same time, or at any other time, but it has a huge circumference.
阿特拉斯是两者中较平整的一个，极点间的直径只有18公里，但它的赤道周长却有40公里。
Atlas, the flatter of the two, has a diameter of only 18 kilometers from pole to pole but is almost 40 kilometers across its waist.
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.
要将这个公式转换为表达式，你需要使用变量来记录半径及周长。
To translate this formula into a expression, you would use variables to record the radius and circumference.
蓝旗用来显示发掘地的周长，而黄旗用来标明发掘出化石或石制工具的地点。
Blue flags define the excavation perimeter, while yellow ones mark the location of fossils or stone tools.
类似于“将长度和宽度以参数的形式传递给面积和周长，而非在构造函数里指定”这样的错误，可以通过重构来修正。
Mistakes, like passing the length and width as parameters to Area and Perimeter rather than to the constructor, are corrected by refactoring.
公元前200年，埃拉托色尼在计算地球到太阳的距离时，已经推算出地球的周长。
Eratosthenes calculated the distance to the sun in 200bc, having already deduced the circumference of the Earth.
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.
线速度，在这个例子里，就是速率，是这个圆环的周长，除以走一圈，需要的秒数。
And that linear velocity, which, in this case, is really your speed, is of course the circumference of the circle divided by how many seconds it takes to go around.
第二个测试(计算周长为10)，与前面的方法相似。
The second test (calculate the perimeter as 10 units) works in a similar way.
有趣的是，当我们测量心脏的，输出量时，我们需要测量30种不同的周长。
It's interesting to know that when we measure the output of the heart, there is about 30 different perimeters that are measured.
其中一棵杉树，据测有7200年的树龄，树身周长1***米。
The oldest Yakusugi is 7200 years old and the perimeter of its trunk is 1*** meters.
给定周长寻找直角三角形。
这座丛林的主宰者是石松科植物：这是一种带有鳞片的植物，树干的周长可达6英尺（约1.83米），树身可高达120英尺（约36.6米），而且还会结出富含孢子的松果球。
The lords of this jungle were the lycopsids: scaly plants with trunks up to 6 feet in circumference that grew up to 120 feet in height and bore spore-producing cones.
也就是在那里，在哥白尼学说出现的1800年之前，阿里斯塔克确立了以太阳为中心的太阳系的假说，埃拉托色尼计算出了地球的周长。
It was there, 18 centuries before the Copernican revolution, that Aristarchus posited a heliocentric solar system and Eratosthenes calculated the circumference of the Earth.
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.
它的周长有27公里(约合17英里)，身处地下，横跨法国和瑞士两国。
It has a circumference of 27 km (17 miles) and lies underground, straddling French and Swiss territory.
阿特拉斯是两者中较平整的一个，从南极点到北极点的直径只有18公里，但是它的赤道周长却有40公里。
Atlas, the flatter of the two, has a diameter of only 18 kilometres from pole to pole, but is almost 40 kilometres across its waist.
相关栏目：肥胖和松弛 ; 肥胖和耻辱 ;周长控制 ;全球爆炸脂肪 。
Related columns: obesity and laxity; obesity and stigma; girth control; the global explosion of fat.
马洛尼说，安慰剂组的周长减少是典型的安慰剂反应的反映。
Maloney says the reduction in the placebo group is a reflection of thetypical placebo response.
答案是否定的。请记住，我们谈论的周长是在分子的尺度上。
Remember, the girth we're talking about is on the molecular scale.
“随我来，”那个男人说，“翻过那座小山，有个老地窖，几年前是一个人的农场，四周长满了紫丁香。”
"Come with me," the man said. "Over that hill is an old cellar hole, from somebody's farm of years ago, and there are lilacs all round it."
也就是说这些绳链相对于他们的周长非常非常长，所以制造一根长22,000英里（35,400公里）的电缆应该是非常容易的，是吗？
That means they're very, very long relative to their girth, so a 22, 000-mile (35, 400 km) cable should be a snap, right? Well, no.
他们低着头，腿挨腿，像一个焦急的人在城中单独穿行，从四周长着野茴香的弯弯曲曲的柏油路走下去，来到海滩边。
Their heads bent, their legs just touching, they stride like one eager person through the town, down the asphalt zigzag where the fennel grows wild, and on to the esplanade.
相比之下在开普勒-10轨道中发现的那颗行星其轨道周长只有20小时，而且密度很高以至于研究员估计行星内部是由铁组成的。
The planet orbiting Kepler 10, by contrast, has an orbital period of a mere 20 hours and is so dense that it is probably made of iron.
相比之下在开普勒-10轨道中发现的那颗行星其轨道周长只有20小时，而且密度很高以至于研究员估计行星内部是由铁组成的。
The planet orbiting Kepler 10, by contrast, has an orbital period of a mere 20 hours and is so dense that it is probably made of iron.
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