This is the center circle of the pattern.

这是图案的中心圈。

youdao

Erected in the center circle with a vertical bar disk.

在圆周的圆心竖一根与盘面垂直的直杆。

youdao

Create a new layer. Draw a black canvas center circle. Set Inner Shadow, Opacity 100%, Distance 3, Size 10; Outer Glow., Opacity 40%, Spread 5%, Size 29.

创建一个新层。画布中心画一个黑圆。设置一下内阴影，不透明度100%，距离3，大小10；外发光。，不透明度40%，扩展5%，大小29。

youdao

They have a center,and arms of matter that seem to circle the center like a pinwheel.

VOA: special.2009.04.29

When a particle moves in a circle, it has an acceleration towards the center of this size, v^2 over R.

当一个质点在圆周上运动时,它有一个指向圆心的加速度,v^2 / R

耶鲁公开课 - 基础物理课程节选

That means the acceleration is pointing towards the center of the circle and it has a magnitude a.

也就是说加速度,始终指向圆心,其模长为 a

耶鲁公开课 - 基础物理课程节选

Next he uses a delicate kitchen knife to cut out scallop shapes around the center circle.

CNN: Carving up a spooky Halloween

Plows and shovels were used to clear the penalty areas, center circle and midfield stripe as snow got heavier, and a yellow-and-purple ball was used.

WSJ: Americans Beat Costa Rica 1-0 in Snow

After the final whistle, the fans in their superhero outfits went quiet for the first time all morning while both teams gathered in the center circle, eyes closed and heads bowed.

WSJ: American Team Reigns in This Devout Soccer League