Bestselling Swiss author Erich von Daniken believed they were built by stranded extraterrestrials.
瑞士畅销书作家埃里希·冯·丹尼肯认为它们是由受困的外星人建造的。
One answer appeared in 1969, when the German researcher and writer Erich von Daniken proposed that the lines were drawn by extraterrestrials as runways for their aircraft.
1969年，德国研究人员兼作家埃里希·冯·丹尼肯提出，这些线条是外星人为它们的飞机绘制的跑道。
This prompted Erich von Daniken in his book Chariots of the Gods to suggest that they actually were runways for extraterrestrial craft.
埃里奇·冯·丹尼肯在他的《神的战车》一书中提到那实际上是外太空飞船使用的跑道。
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