vegetation index

例句：

1. 1. The forest provides a significant contribution to the local ecosystem.
   森林对当地生态系统的贡献是显著的。
2. 2.The vegetation index has been shown to be an effective tool for monitoring forest health.
   植被指数已被证明是一种有效的监测森林健康状况的工具。
3. 3.The study used satellite data to calculate the vegetation index and analyze its impact on climate change.
   该研究使用卫星数据计算植被指数，并分析其对气候变化的影响。