For a cheaper, although not quite as direct, method, journey north of the Arctic circle around the summer solstice and spend a night (ideally in a hot tub) watching the sun circle above the horizon.
当然一个低成本但不是相当直接的方法是，夏至时去北极圈旅行，花一晚上的时间(能在热水缸里最好)看地平线以上的太阳圈。
This method features simple definition for the circle median number, low computation and easiness to converge.
该方法的圆中数定义简单，计算量小，且易于收敛。
From advertising information motion, analyzed the reason for advertising information vicious circle, and put forward the method to promote it to good circle.
从产品广告信息运动出发，分析了产品广告信息运动恶性循环的成因，提出了促进其良性循环的方法。
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