n. coyoting
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描述了长城沿线农牧交错区天然草场退化现状，指出退化主要原因是干旱少雨、超载放牧、滥垦和不合理利用土地、滥采乱挖。
The actuality of degenerated nature grassland in northern agro-grassing acetone along the line of the great wall was described in this paper.
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