长期以来，研究植物的科学家采用卫星测量植被的新鲜指数，即观测植物反射阳光值，预测植物的状态。 植物新鲜指数的变化是季节性的。
Scientists who study plants and trees from space have long relied on satellite-derived measures of “greenness”—that is, observations of the amount of sunlight reflected by vegetation.
MODIS植被指数是植被生长状态及植被覆盖的最佳指示因子，也是季节变化和人为活动影响的重要指示器。
MODIS vegetation index is a factor of the best indicators between state of vegetation growth and vegetation cover.
归一化差值植被指数(NDVI)是植被生长状态和空间分布的指示因子，区域气候对植被生长起着重要作用，两者具有密切的相互关系。
NDVI is an indicator of vegetation growth and its spatial distribution, with has a close relationship with climate conditions.
植被指数(NDVI)和叶面积指数(LAI)是两个非常重要的陆地生态系统植被状态参数。
The vegetation index (NDVI) and leaf area index (LAI) are two key important land vegetation ecosystem status parameters.
植被指数(NDVI)和叶面积指数(LAI)是两个非常重要的陆地生态系统植被状态参数。
The vegetation index (NDVI) and leaf area index (LAI) are two key important land vegetation ecosystem status parameters.
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