The relationship between urbanization and air qualities in the Northwest region of China is studied.
以西北地区省会城市为研究对象，研究西北地区城市化与空气质量之间的关系。
From the late 1980s to the early 1990s, a range of test launches were conducted in the Gobi Desert in the northwest region of China.
从1980年后期到1990年早期，一系列试射在中国西北部的戈壁沙漠中进行。
The systematical findings were achieved, which will play very important reference value in rain water development and improvement of human and animal drinking water in the northwest region of China.
研究成果对于我国西北地区雨水资源开发利用以及解决人畜用水问题具有十分重要的参考价值。
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