Yet, they were reduced by half during the 20th century. 然而 20世纪内它们锐减过半
The first natural parks were created just over a century ago. 第一个自然公园创建于一个世纪前
How can this century carry the burden of nine billion human beings... 这个世纪怎么负起九十亿人的重压
caused, in the 20th century alone, a rise of 20 centimeters. 单单在20世纪 海平面就上升了20厘米
In the last century, half of the world's marshes were drained. 上世纪内 地球一半沼泽消失殆尽
From the lack of water in the coming century. 成为最为缺水的国家
And a century ago, the bison were reduced to barely 1,000. 一百年前 野牛的数量曾锐减至不到一千
And there hasn't been a bloom like this one for a century. 这里已有一个世纪 没有像现在这样开满鲜花