埃肯，足球运动员，喀麦隆人，位置是前锋，现效力于法国勒芒俱乐部。
有关特定工业废水处理方法的资料可查阅埃肯·菲尔德和尼莫鲁的著作。
For information on specific waste-water treatment processes, the reader should consult Eckenfelder and Nemerow.
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。
Bestselling Swiss author Erich von Daniken believed they were built by stranded extraterrestrials.
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。
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.
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