The results showed, The forest cover percent was positive correlation with greenness indices;

其结果表明：林木覆盖率与绿度值呈正相关；

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The total forest cover of the earth is decreasing.

地球上森林覆盖的总面积正在减少。

《牛津词典》

However, due to a considerable variation in land area, 1 population density and climatic, geological and topographical conditions, the extent of forest cover differs greatly among the island states.

然而，由于各岛屿国家的陆地面积、1人口密度、气候、地理地形条件等有很大差异，它们的森林覆盖程度也有很大差别。

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The dense forest cover teems with birds and butterflies, and natural swimming holes in the rivers are not hard to find.

BBC: Hiking in the landslide capital of the world

Tasked with enforcing the law, the park guards often cover the forest on foot, gathering clues to track an evasive enemy.

CNN: Rangers risk their lives to save African forest elephant

Reforesting Scotland, a pressure group which wants to recreate the native pine forest that used to cover the moorlands, says many more jobs could be provided by replacing the heather with a mixture of forestry, small-scale agriculture and wildlife tourism.

ECONOMIST: Blasted moors