短語詞組短語grassland vegetation coverage 草地植被蓋度grassland vegetation growth 草原植被長勢degraded grassland vegetation 退化草地植被grassland vegetation fluctuation 植被波動Grassland vegetation cover change 草地植被覆蓋變化grassland vegetation status 草地植被生長狀況sandy grassland vegetation 沙質草原植被grassland vegetation cover 草地植被 返回 grassland vegetation