搜索筛选:
搜索耗时0.0387秒,为你在为你在61,042,058篇论文里面共找到 1 篇相符的论文内容
发布年度:
[期刊论文] 作者：Togtohyn Chuluun,Dennis OJIMA,
来源：中国科学C辑 年份：2004
Dramatic changes in land use have occurred in arid and semi-arid landsof Asia during the 20th century. Grassland conversion into croplands and ecosystem degrada...
相关搜索：
