desertifiedCOCA²⁸⁰¹³⁶⁺⁵BNC²³⁶²¹³⁺¹ 基本例句 🌏荒漠化 Meanwhile, considering the ratio of non desertified land area and different degree desertified land area, a regional evaluation model of land desertification level was given out. 在此基础上，考虑到非荒漠化土地及各程度荒漠化土地在面积上的组成比例，给出区域性土地风蚀荒漠化总体水平评价模型； cnki