The total forest cover of the earth is decreasing.
地球上森林覆盖的总面积正在减少。
One percent of Brazil's total forest cover is being lost every year to deforestation.
由于滥伐，巴西的森林总覆盖面积正在每年减少百分之一。
China's increasing forest cover.
中国的森林覆被不断扩大。
Forest Cover 2000 and Changes in Forest Cover 1990-2000.
2000年森林面积和1990- 2000年森林面积变化。
Percentage of forest cover in different historic periods of china.
中国历代森林覆盖率的探讨。
Great storm and small forest cover are direct and indirect reasons why flood occurs.
高强度暴雨、低的森林覆盖率和严重的水土流失，是产生洪灾的直接和间接原因。
Protect the forest of water source, and increase the cover rate of forest;
保护水源林，提高林木覆盖率；
Protect the forest of water source, and increase the cover rate of forest;
保护水源林，提高林木覆盖率；
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