·2,447,543篇论文数据，部分数据来源于NoteExpress
但紫色土成土母岩结构疏松，易风化，抗蚀性低；
But the structure of purple soil parent material is loose and easy to efflorescent, anti-erodibility;
youdao
应用推荐
模块上移
模块下移
不移动