A circle,as an ideal pure form,with its centripetalism and self-sufficiency,possesses a high degree of aesthetic value and expressive force.

圆为理想的纯粹形态,其向心与自足特性,具有很高的审美值和表现力,深得建筑师、规划师的青睐,以致成为规划设种普适性的模式。