concentrical

例句：

1. 1. The planetsare concentric around the sun.
   行星围绕太阳运行。
2. 2. The center of the circle is theconcentrical point.
   圆心是圆的同心点。
3. 3. The circumferenceof a circle is its concentricalmeasurement.
   圆的周长是其同心测量。