圆周上各点离圆心的距离相等。
地球的圆周约为25,000英里。
我必须有很多波长才能绕这个圆周。
I have to have a whole number of wavelengths to get around the circumference.
不要把沿圆周的切向加速度与向心加速度混淆。
Do not confuse ever the tangential acceleration, which is along the circumference, with centripetal acceleration.
现在所有的质量都在圆周上，现在它会花更多的时间。
Now all the mass is at the circumference, and now it takes more time.
假设您想要创建一个放射状的列表框，将其内容沿圆周排列，就像一个旋转木马。
Imagine you want to create a radial list box that arranges its content along a circle, like a carousel.
为了纪念祖，一些数学家建议称圆周率为“祖率”。
In order to remember Zu, some mathematicians suggest calling pi "Zu Lv".
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.
这是导致速度，沿着圆周改变的因素。
This is the one that makes the speed change along the circumference.
现在我们讲讲匀速圆周运动。
它如同圆周一样可靠而规律。
2010年3月14日：圆周率日。
葡萄酒杯的直径与圆周晃动的宽度的比率；
the ratio of the diameter of the glass to the width of the circular shaking;
什么是匀速圆周运动？
从匀速圆周运动来看。
在他之前，人们认为，它们不是做圆周运动。
Before him, people were saying, well, they cannot move in a circle.
上述函数决定离开圆周的偏移量和各线段的长度。
The functions above determine the offset from the circle edge and length of each line.
今天我们将讨论，我们所说的“匀速圆周运动。”
Today we will discuss what we call "uniform circular motion."
他凭记忆背诵圆周率到22 514位。
我们需要把看出一个接一个很小的圆周运动的叠加。
We need to add smaller circular motions on top of each other, and so on.
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.
否则无法做圆周运动。
我选了圆周率的符号。
如何解释可见行星并不是，连续不断地做圆周运动呢。
How did they explain the fact that the motion of the planets visibly was not just straight consistent circles.
所以所有的材料都是在圆周上，现在它会花更多的时间。
So now all the mass is at the circumference, and now it takes more time.
究竟何物把上帝完美的圆周运动替换成了物质的奋斗呢？
Which instead strives to imitate the perfection of God by moving in circles?
它们都在做着圆周运动，必然以其为奋斗目标。
Well, we see those moving in circles, they must be striving to move in circles.
它们都在做着圆周运动，必然以其为奋斗目标。
Well, we see those moving in circles, they must be striving to move in circles.
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