As an important part of documental information communication system, a library's documental information communication activity is often conditioned by the environment it belongs to.
图书馆作为文献信息传播系统的重要组成部分，其文献信息传播活动必然受到所处环境的制约。
In fact most of the value does not become small or lost but is transferred to other documental forms or information carriers with people's use.
实际上，价值的大部分不是变小或消失，而转移了，随着人们的利用转移到其他文献形式或信息载体之中了。
On-line cataloging, revealing method of documental catalogue and the catalogue information system are results of scientific restructure.
联机编目、书目文献的揭示方法、书目情报系统是科学整合的结晶。
On-line cataloging, revealing method of documental catalogue and the catalogue information system are results of scientific restructure.
联机编目、书目文献的揭示方法、书目情报系统是科学整合的结晶。
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