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When the school begins, students need to start their new semester, the first thing they do is to buy the text books, most students will buy the new books, while it has become popular that students choose to buy the second-hand text books. It is good that text books are recycled, it can save the resource and reduce the waste, thus leaving more resources to the next generation. What’s more, it also saves students a lot of money. Students can buy the second-hand book at a very low price, students use the book only for a semester, it will become useless after they reading it, so there is no need for them to spend so much money on the contemporary book.

當(dāng)開(kāi)學(xué)的時(shí)候，學(xué)生需要開(kāi)始他們的新學(xué)期，他們做的第一件事情就是買課本，大部分學(xué)生會(huì)買新的課本，然而一些學(xué)生選擇買二手書(shū)，這變得越來(lái)越流行。課本循環(huán)使用，這是好的，這能節(jié)省資源和減少?gòu)U物，給后代留下更多的資源。而且，這也省下學(xué)生很多錢。學(xué)生可以低價(jià)買下二手書(shū)，他們的書(shū)本只用一個(gè)學(xué)期，看完后就會(huì)變得無(wú)用了，所以對(duì)他們來(lái)說(shuō)沒(méi)必要花那么多的錢在暫時(shí)性的書(shū)本。