To select the outer circle, create an elliptical selection around the circle.
要创建其外圆，要创建一个近似正圆的椭圆。
Step 55: Shadow Draw elliptical selection under the communicator and fill it with black.
第五十五步：在主体底部建一椭圆选区，填充黑色。
Select the elliptical Marquee Tool, and then make an elliptical selection at the bottom of your welcome image.
选择椭圆选框工具，然后在欢迎图片下方画一个椭圆。
While holding Alt create another elliptical selection so that you would subtract the original selection to leave you with the thickness of the outer button's light as shown in the illustration below.
在创建另一个椭圆选区时按住 Alt 键，这样就能用这个圆减去原来那个外圆，于此你就得到下面展示的示意图那样的按钮灯外环厚度。
Now use the Elliptical Marquee Tool and create a circular selection as shown.
现在使用椭圆选框工具创建一个圆形选区，如下图。
Select the Elliptical Marquee Tool (m) and make a selection over the divider line.
选择椭圆选框工具(M)然后在分割线上面画出一个椭圆。
This paper discusses the design method for high speed loop test road in terms of selection of geometric alignment and parameters of elliptical high speed test road.
本文从几何线型选择及椭圆形高速环道主要参数控制几个方面论述了高速环形试验路的设计方法。
This paper discusses the design method for high speed loop test road in terms of selection of geometric alignment and parameters of elliptical high speed test road.
本文从几何线型选择及椭圆形高速环道主要参数控制几个方面论述了高速环形试验路的设计方法。
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