Last week, the Student Union organized a school project of collecting used books on campus, attracting a large number of students from different departments to participate.

At the beginning, the host highlighted the significance of collecting second-hand books from the perspectives of affordability, accessibility and environmental awareness. Then, several representatives shared their own viewpoints and experience about how to acquire needed used books. And last came the most exciting activity of exchanging books with students around, a process where students can release pressure and make more like-minded friends.

Clearly, the project was aimed at collecting used books and then offering them to others in need. Despite the rising popularity of e-books and digital publications, traditional printed books are still not exactly cheap. Using less expensive second-hand books is therefore a great way for college students to save a pile of money. Furthermore, a large proportion of used books of different types are in good condition and can be used for a second or even a third time.

In conclusion, the project was a great success and achieved good results.

1. Last week, the Student Union organized a school project of collecting used books on campus, attracting a large number of students from different departments to participate.

本句是简单句。句中attracting a large number of students from different departments to participate是现在分词短语，充当结果状语，表示活动取得的成果，因为动词attract和其逻辑主语project之间为主动关系，故使用现在分词形式。

2. And last came the most exciting activity of exchanging books with students around, a process where students can release pressure and make more like-minded friends.

本句是主从复合句。主句last came the most exciting activity of exchanging books with students around是倒装结构，与上句衔接更紧密。a process是同位语，指代activity。where引导定语从句，修饰a process。

上周，学生会组织了一个在校园内收集二手书的学校活动，吸引了很多来自不同院系的学生前来参加。

首先，主持人从可负担性、可获取性和环保意识几个方面强调了收集二手书的重要性。然后，几位代表就如何获取所需的二手书分享了自己的观点和经验。最后，最激动人心的活动开始了，和身边的同学交换书籍，在这个过程中，学生可以释放压力，还可以结交更多志同道合的朋友。

显然，该项目旨在收集二手书，然后把它们提供给需要的人。尽管电子书和数字出版物越来越流行，但传统的纸质书仍然不便宜。因此，对于大学生来说，使用价格更低的二手书是省钱的好办法。此外，大量不同类型的二手书保存状况良好，可以第二次甚至第三次使用。

总之，该项目取得了巨大的成功，达到了良好的效果。