The total output is double that of last year.
总产量是去年的
倍。
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演讲综合 They cover about 6 percent of the land surface on earth but some estimates suggest they used to cover twice that but had been dramatically reduced by deforestation, cutting them down for human use like wood, farmland or mining.
热带雨林占地球表面
6%,但是有
估计热带雨林以前
面积是现在
两倍,但是遭到了严重
森林砍伐。
们
了木材、耕地和矿物大量砍伐雨林。