Sandstorms is one of the major natural disasters in north China region.
沙尘暴是我国北方地区的主要自然灾害之一。
This method of fertilizing can be used in the cold region in North China.
可作为北方寒地稻作区的施肥技术。
The method is applied to estimate the seismic occurrence rate in North China region.
该方法被应用到估计华北地区地震发生的概率密度。
The method is applied to estimate the seismic occurrence rate in North China region.
该方法被应用到估计华北地区地震发生的概率密度。
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