The topic of partitioning and filesystems is a contentious one among system administrators.

分区和文件系统是系统管理员们争论的主题之一。

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BISAC levels of specificity complement Library of Congress Subject Headings, allowing patrons to drill down into a topic in an intuitive system of guided navigation.

BISAC的等级补充了国会图书馆的主题词，让读者能够在带有导航功能的系统中进入某一个具体的主题。

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The main goal of this system is to integrate different kinds of digital resources on Internet, which is a basic research topic of digital library.

这个系统的主要目的，就是综合互联网上各种不同的信息，这也是数字图书馆计划的一个基础研究课题。

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The first newsgroups and discussion groups appeared in the early years of the Internet, around 1980, and the bulletin board system allowed topic-related discussion groups from 1990 on.

FORBES: The Entangled Revolution Has Begun

The smacking ban was the first topic on the agenda of the new system of member-led debates.

BBC: Debate by an Individual Member

Replying for the government, Baroness Hanham reminded peers the system had "a history going back generations" but pledged to raise the topic with other ministers.

BBC: Calls for UK laws to be made easier to understand