在北方干旱地区，市区性河流黑臭现象尤为严重。
Particularly, Arid areas in northern cities, this phenomenon is much more serious.
我国北方干旱地区，是经济落后、生态环境脆弱区域。
The northern arid land of China is economically backward and ecologically fragile.
北京昨日被笼罩在桔黄色的沙尘中，据悉这股强沙暴来自于数百英里外的中国北方干旱地区。
Beijing has been shrouded in orange dust as a strong sandstorm blew hundreds of miles from drought-struck northern China to the nation's capital.
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