The concentric circles and spiral patterns indicate the vortex portal of the area, the entry into what the indigenous termed as Spirit world.
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。
2
Around the dark core of an optical vortex, the energy flow carried by the light beam is like a spiral staircase, flowing in a clockwise or counterclockwise direction.
绕着光涡旋的黑暗中心，光束携带的能量流就像螺旋梯，沿着顺时针或者逆时针方向流动。
3
The research indicates that the microscale spiral (vortex)growth dislocation is another important growth mechanism of Pteria penguin and blister pearl from Sanya, Hainan Province.