西北干旱区 northwest arid area ; northwest arid zones of china ; arid area of northwest china
西北干旱地区 northwest drought district
西北干旱内陆区 the arid inland region in northwestern china
西北干旱区成因 forming causes of northwest china drought area
西北干旱荒漠区 West North Desert of China
西北干旱荒漠区特征 the arid deserts area in North-West China
西北典型干旱区 Typical arid region in Northwest China
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西北干旱区，为典型的内陆干旱气候。
西北干旱地带农业区的灌溉水入渗是地下水补给的重要途径。
The seepage of irrigation water is an important source of groundwater in the irrigated farm region of arid area Northwest China.
西北干旱区内陆绿洲的主要生态环境特点，导致其特殊的农业特点；
The oasis agriculture appears the special characters due to the eco - environment characters of arid area of northwest region.
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