我在电视上听关于中国的消息，在纸媒上读关于中国的新闻，所以我知道中国在近几十年的快速发展。

I hear news about China on television and read about it in print media, so I know of the rapid development of China in recent decades.

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和需要超过十年的树生长，所以我们必须从现在开始用更少的纸。

And it takes more than ten years for a tree to grow, so we must start using less paper now.

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所以我们可以想象一下，捡起一张纸，卷起这两个区域以致它们靠得很近。

So we can imagine picking up this piece of paper, and curling these two regions so that they're close to each other.

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