这部分由于越来越多的耕地转化为工业用地，部分由于人口的增加。
This is partly because more and more farmland is being given over to industry and partly because the population is growing.
土地利用类型转移的主要方向是林地转化为耕地和建设用地、耕地转化为建设用地；
The main directions of land use types transfer were the conversions between woodland, cropland and construction land, the conversions between cropland and construction land.
人类经济活动的影响，大量耕地转化为非农业用地，耕地的主要去向是居民点及工矿用地、交通用地。
Because of the effect of human being activity, a great deal of infield was transformed into non-infield, residential and industrial area, traffic utilization.
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