Unlike most of the other grass-eaters in the Sahara, the giraffe doesn't migrate (leave its homeland) during dry seasons because it gets enough water from the leaves it eats.

在撒哈拉沙漠，和其它大多数食草动物不同，长颈鹿在干旱季节不迁徙(离开它的家)，因为它可以从吃的叶子中获得充足的水分。

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Use bottled water quickly, as chemicals may migrate from plastic during storage.

尽快的使用瓶装水，因为化学品在存储过程中会从塑料迁移到水中。

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African elephants migrate in search of water sources during the annual dry season.

每年旱季非洲的大象为寻找水源而迁移。

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However, the shale rock containing natural gas is separated from underground water aquifers by impermeable layers of rock that do not allow any hydraulic fracturing fluids to migrate into underground water aquifers.

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And that fracking can cause natural gas to migrate into drinking water sources.

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The turbulent flow of water creates undulations in the bed sediments - a series of ripples or dunes that slowly migrate in the direction of the water current.

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