当从两个观测点观察时，这些塔可以测量每年的太阳高度变化，并以近乎完美的精度为太阳设置了弧形的缺口。
When viewed from two observation points, the towers measure the annual rising and setting arcs of the sun with near-perfect accuracy.
当从两个观测点观察时，这些塔可以测量每年的太阳高度变化，并以近乎完美的精度为太阳设置了弧形的缺口。
When viewed from two observation points, the towers measure the annual rising and setting arcs of the sun with near-perfect accuracy.
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