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永州市有紫色岩、钙质岩、石灰岩造林困难地9.08万公顷，是我省“三难地”种类最多、分布最广、面积最大的市。1999年11月，他们紧紧抓住省林业厅在该市办点的契机，向“三难地”宣战。经过两年多的艰苦奋斗，已取得明显成效，完成“三难地”改造7580公项。 依靠科技支撑?
There are 90,800 hectares of purple rock, calcareous rock and limestone afforestation in Yongzhou City. It is the city with the largest variety, the most extensive distribution and the largest area in our province. In November 1999, they firmly grasped the chance of the Provincial Forestry Department to set up a business in the city and declared war on “three difficulties.” After more than two years of hard work, we have achieved remarkable results and completed the “three-difficult” transformation of 7580 public projects. Rely on science and technology support?