筹到的钱款将用来挖井眼，再将水抽入干涸的湖中。
The money raised will be used to dig bore holes to pump water into the dried-up lake.
它们与地球上的河流系统非常相似，地质学家认为它们是早已消失的河流留下的干涸的河床。
They bear a strong resemblance to river systems on Earth, and geologists think that they are dried-up beds of long-gone rivers.
他们的迁徙可能是人口增加引起的，这一人口增长是由人们逃离撒哈拉沙漠的干燥或干涸的迁移造成的。
Their migration may have been set in motion by an increase in population caused by a movement of peoples fleeing the desiccation, or drying up, of the Sahara.
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