参考词汇:资源natural resource;节约型社会an energy-saving society
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As we know, when junior students graduate from school, most of their reference books as well as textbooks are thrown away. It wastes a lot of natural resource. From now on,we can save these usefull books and give them to the fresh as a gift. That can build an energy-saving society and minimise waste. Of course the notes on the books are very usefull. Other countryies have already done that for a long time. It's very successful.