This formula is used to calculate the area of a circle.
这个公式用于计算圆的面积。
Create a functional index on the area of the circle.
对这个圆形区域创建一个函数索引。
Next, create an SPL function that returns the area of a circle given its radius.
接着，创建一个spl函数，它将返回给定半径的圆的面积。
This example shows how to create a functional index on the area of a circle.
本示例展示如何对圆的面积创建函数索引。
Well, it's just the area of a unit circle.
这就等于一个单位圆的面积。
Example: Functional index on the area of a circle
示例：对圆的面积执行函数索引
Let's say that we want to find the area of an ellipse with semi-axes a and b. OK, so that means an ellipse is just like a squished circle.
现在需要计算一个以a，b为半轴的椭圆的面积,其实椭圆就是一个被压扁的圆。
This is beneficial when the dataset is large and the frequency of queries that request the area of a circle is high.
如果数据集较大，或者经常发出请求圆面积的查询，那么创建函数索引将有助于提高性能。
The Kalkar complex sprawled over an area the size of 80 soccer fields and had enough wiring to circle the globe… twice.
Kalkar核电站遭遇的复杂情况源于其有80个足球场那么大，装电线多到可以环绕地球一圈，甚至两圈。
In this chapter, we are (finally) going to write fruitful functions. The first example is area, which returns the area of a circle with the given radius.
在本章，我们总算要写一些有返回值的函数了。第一个例子就是一个计算给定半径的圆的面积的函数。
One of the problems that has never been solved is that of "squaring the circle." This really means to find the exact area of a circle.
一个一直没有得到解决的问题是，怎样“求圆的面积”。这个问题的真实意思是：求一个圆的精确面积。
In the dark gray gutter to the left of the text area, double-click to create a breakpoint. It looks like a little blue circle, as you can see in Figure 6.
在文本区域左边的深灰色槽中，双击创建一个断点。
As an example, we'll write a function that takes two points, the center of the circle and a point on the perimeter, and computes the area of the circle.
下面我们写一个函数作为例子，这个函数需要两个点，一个是圆心，一个是圆周上面的点，函数要用来计算这个圆的面积。
Each morning use sunscreen cream to smear a square and a circle area on the back of one's hands.
每天早上用防晒霜在自己的一只手背涂一个方块，在另一只上涂一个圆。
A new analogue analysis model on the inner circle grinding is set by meshing the grinding area of work-piece surface.
借助于工件磨削区域的分割和砂轮表面的离散化处理，建立了一种新的内圆磨削模拟计算模型。
The Icefjord Centre will be located 150 miles north of the Artic Circle in Ilulissat, a UNESCO-protected area on Greenland's western coast.
冰湾中心位于伊卢利萨特的北极圈以北150英里的地方，它是受联合国教科文组织所保护的格陵兰岛西海岸地区。
The radius of a circle is 4cm, how many square centimeters is its area?
一个圆的半径是4厘米，它的面积是多少平方厘米？
Sanxingdui Ruins is located in the central area of the Shu culture circle, and it is the representative of this culture as well as the center of the ancient Shu culture.
三星堆遗址位于蜀文化圈的中心区域，是蜀文化的典型代表，也是古蜀文化的中心。
How to create a marker only drawable into the bounds of the circle area?
如何创建一个标记只冲成圆的面积范围？
All violations and fouls in the area extending from the top of the free-throw circle in the back court to the top of the free-throw circle in the front court on his side.
从后场的罚球圈顶延伸至前场的罚球圈顶，他这一侧区域中所有的违例和犯规。
The study of the earthquake has some significance for the mid-long term earthquake tendency analysis in THW CapitaI Circle area, and for the evaluation of seismic safety in the area.
此地震的研究对首都因重点监视防御区的中长期地震趋势分析和该地区地震安全性评价有一定的意义。
For a centrifugal ballast cleaning machine, the circle section of a centrifugal sieve is an important settling area.
离心筛式道碴清筛机上，离心筛的圆弧段是重要的筛分区段。
It can only be taken from the shooting circle, a roughly semi-circular area in front of the opponents' goal.
只能在射门区内攻进的球才能得分。射门区是对方球门前的一个大致呈半圆形的区域。
The circle radius of the user input or square edge length, the area is calculated and displayed.
说明：对用户输入圆半径或正方形边长，计算并显示其面积。
An analysis was made on the connection mechanism of the pressing circle and on the metallographic structure at the circle area.
对冲压圆点连接的机理和圆点处的金相组织进行了分析。
Corner Area: the edge line with the goal line cross, have a dot, radius is 1m, drawing a quarter of circle arc.
角球区：以边线和球门线交叉点为圆点，以1米为半径，向场内各画一段四分之一的圆弧，这个弧内地区叫角球区。
According to the area of capillaries, the number of capillary and the formula of circle, the equivalent radius of the five kinds of the yarns was gotten.
统计典型区域中毛细管个数，参照圆面积公式得到纱线中毛细管当量半径。
To the middle stage of Warring States period, the simplified form of circle-point pattern completely disappeared on the animal-shaped plate in Jibei area and Liaoxi area.
战国中期，简化圈点纹在冀北和辽西地区的动物纹牌饰中彻底消失。
To the middle stage of Warring States period, the simplified form of circle-point pattern completely disappeared on the animal-shaped plate in Jibei area and Liaoxi area.
战国中期，简化圈点纹在冀北和辽西地区的动物纹牌饰中彻底消失。
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