Methods for on-line retrieval and consulting of chemical information from Internet were summarized, meanwhile some outstanding chemical web sites are listed.
简要概括了互联网上化工信息检索和查询的方法，并列举了一些优秀的化工网站。
This text discuss how to take on issues retrieval service in the library of hospital attached to a medical university in digital time, furnish information service new model for clinical front line.
探讨数字时代医科大学附属医院图书馆如何承担课题检索服务，为临床一线提供新型的信息服务模式。
There are three concepts in information on line search:(user's)question concept, indexing concept, retrieval concept.
联机检索过程中存在三个概念：提问概念、标引概念、检索概念。
This paper describes a multi-user on-line retrieval system, which was developed and used to process library document information in people's university.
本文叙述了一个图书文献情报多用户联机检索系统。
Through the example of Tongji Information Retrieval Network System (TJIRNS), the paper mainly describes on-line expansion function and its implementation under the specific conditions.
文中以同济情报检索网络系统（TJIRNS）为例，论述了典型环境中联机扩展功能及其实现过程。
Through the example of Tongji Information Retrieval Network System (TJIRNS), the paper mainly describes on-line expansion function and its implementation under the specific conditions.
文中以同济情报检索网络系统（TJIRNS）为例，论述了典型环境中联机扩展功能及其实现过程。
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