previous After the raining season, fresh water collects between sand dunes, forming blue and green lagoons that reach their fullest between July and September. next

上一幅 倫索伊斯馬拉赫塞斯的奇妙在於每年雨季後七至九月，在沙漠中造出無數的藍綠色的池塘。下一幅

Department of Mathematics, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
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Last modified: 31 October 2010