scale index的用法和样例：
例句
- Index of nibbled degrees and approximation degrees shows the landform development and the developmental stages of drainage system within a watershed area.
沟沿线对流域边界的逼近度指标，从流域尺度反映流域地貌系统发育阶段。 - Yulin District and Hengshan County were taken as the cases, and ecological security index system was constructed to assess the security levels of the two regions.
选择了榆林市和横山县两个行政单元，针对区域特征，构建了不同尺度上的生态安全指标体系，利用层次分析法，对不同尺度上生态安全的空间分异进行了研究。
