Libraries and book lending are a great green practices insofar as they encourage the use of Shared resources and cut down on crates of pressed tree pulp circulating the globe.
图书馆和图书借阅均是伟大的环保实践，它们鼓励人们资源共享，减少包装箱的使用，从而减少纸浆的需求。
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The paper analyzes the current situation and reasons of the defacement of circulating books in university libraries, points out the hazards and proposes some countermeasures against the problem.