陕北的榆林地区是全国著名的画像石产区之一。
Yulin of northern Shaanxi is the important production areas of stone reliefs in the whole country.
通过对陕北榆林风沙区防风固沙林体系的配置结构、树种组成、防风固沙效益、改良土壤的作用以及对天然植被的影响等的调查、观测和分析，结果表明：其配置结构较为合理，生态效益较为显著。
The effects of the sandbreak forest system in Yulin sandy area on the sandbreak, soil improvement and natural vegetation recovery were studied by investigating their configuring structure and species.
陕北榆林市既是我国重要的能源重化工基地，又是生态环境极端脆弱的危急区。
Yulin city is an important national base of heavy-chemical engineering, and an extremely vulnerable area as well.
榆林市位于鄂尔多斯盆地，是陕北能源重化工基地的重要组成部分。
The Yulin City locates in the Erdos basin, and it is important component of energy source and chemical base in the north of Shaanxi province.
2003年冬季，作者相继在关中平原东部的黄河湿地、陕北榆林淡水湖泊区以及汉江流域对雁形目鸟类的迁徙状况进行了研究。
Researches on stopover during migration of Anatidae birds were carried at Yellowriver wetland, freshwater lake areas in Yulin city and Hanjiang river in winter from 1998 to 2003.
2003年冬季，作者相继在关中平原东部的黄河湿地、陕北榆林淡水湖泊区以及汉江流域对雁形目鸟类的迁徙状况进行了研究。
Researches on stopover during migration of Anatidae birds were carried at Yellowriver wetland, freshwater lake areas in Yulin city and Hanjiang river in winter from 1998 to 2003.
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