土地资源利用系统是一个复杂而巨大的社会、经济和生态系统，传统的定性与定量方法难以有效地解决土地资源利用系统的问题。
The land resources utilizing system is such a big and complicated system concerning with society, economy and ecology that we can not efficiently resolve this problem by traditional methods.
近年来，关于矿山采坑废弃土地的生态环境受到了广泛的关注，而其中土壤动物的种类和数量问题却没有得到应有的重视。
In recent years, the ecological environment of the abandoned pit land in mines has aroused wide attention while the quantity and varieties of the soil animals (haven't) received due attention.
土地沙漠化作为土地的一种退化形式，已成为中国北方地区一个重大的生态环境和社会经济问题。
Soil becomes desert as a sort of retrogresss form of soil has become a great problem of entironment and society economy in north area.
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