同心圆和螺旋图指出了此地的漩涡入口，也就是土著人所称的灵性世界的入口。
The concentric circles and spiral patterns indicate the vortex portal of the area, the entry into what the indigenous termed as Spirit world.
我已经上了两个小时的几何课，一直等着教授结束这个关于同心圆和凹面图的讲座。
I had been sitting in geometry class for two hours, waiting for the professor to conclude his lecture about concentric circles and concaved figures.
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