Now, many primary schools and middle schools are recycling textbooks. In my opinion, it’s necessary.
现在,许多小学和中学都回收课本。在我看来，这是有必要的。
As you know, save paper means save trees and money. Trees also have many advantages, like: to produce oxygen, control the climate. Some trees can produce rubber or medicine etc. Trees are a kind of natural resources. We must protect them.
如你所知，节省纸张意味着节约树木和金钱。树木也有很多优点，比如:生产氧气，控制气候。一些树可以生产橡胶或医学用途等。树是一种自然资源。我们必须保护他们。
To print books, we must use a lot of time and people. We have to use electricity and water. In China water is ‘rare’. So we must save it! Save water is everybody’s responsibility.
印刷书籍。我们必须用大量的时间和人力。我们必须使用电和水。在中国，水是“稀有”的。所以我们必须节约它!节约用水是每个人的责任。
In a word. I agree with recycle textbooks and I hope we can do this forever!
总的来说，我同意回收课本，而且我还希望我们可以永远这么做。
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