从Task1讲起吧：剑八 162 页
Globally, 65% of degradation is caused by too much animal grazing and tree clearance, constituting 35% and 30% respectively.
这一句同剑七的第四篇小作文 Page 168考官范文如出一辙：
Between these years electricity production almost doubled, rising from 100 units to 170 in Australia, and from 90 to 180 units in France.
还有 But by 2000 unclear power, which was not used at all in Australia, had developed into the main source, producing almost 75% of electricity...
These causes affected different regions differently in the 1990s, with Europe having as much as 9.8% of degradation due to deforestation, while the impact of this on Oceania and North America was minimal, with only 1.7% and 0.2% of land affected respectively.