它是一个圆，一个循环。
但是如果它是一个圆或者半圆，或者是类似的，即使题目没有提示你在极坐标里做，你也应该认真考虑一下。
But, if it's like a circle or a half circle, or things like that, then even if a problem doesn't tell you to do it in polar coordinates you might want to seriously consider it.
我们这样说一个苹果，它是圆的，红色的。
绿色螺旋线由内部每一个正方形和四分之一圆相切线构成，而红色的螺旋线是黄金螺旋线，它是对数螺旋线的一种特殊类型。
The green spiral is made from quarter-circles tangent to the interior of each square, while the red spiral is a Golden spiral, a special type of logarithmic spiral.
因此，首先它是一些同心圆，这告诉我们,这个图形是一个旋转得到的曲面,当旋转它的时候并没有发生变化。
So, first it's concentric circles that tells us that we have a shape that's a solid of the graph is going to be a surface of revolution. Things don't change if I rotate.
它是圆的，大小很像一个小的黄色的玛瑙。
它是一个持续的圆，在传递时候会生长得越来越大。
It is one continuous circle that only grows greater and greater when expressed.
“圆”这个字如果单就其本身而言，而不与任何圆形物体相联想时，它是一个抽象名字。
Roundness is an abstract term, so long as one considers it by itself and separates if from any subject that is round.
现在它是一个完整的圆了，它滚的很快，很快以至于它注意不到路边的花儿，不能跟路边的虫子交谈。
Now that it was a perfect circle, it could roll very fast, too fast to notice the flowers and talk to the worms.
两个地球：认为我们站在一个“地球”上，它是平的，而另一个在天上的“地球”是圆的。
Dual Earth: thought that one 'Earth' is flat which we are standing on and there is another 'Earth' in the sky that is round.
到底发生了什么，一个圆句柄被这个函数接受因为它是一个形状句柄。
What's happening here is that a Circle handle is being passed into a function that's expecting a Shape handle.
到底发生了什么，一个圆句柄被这个函数接受因为它是一个形状句柄。
What's happening here is that a Circle handle is being passed into a function that's expecting a Shape handle.
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