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。
Library of congress number USA system for bibliographical data. the number is printed on the back of the title-page.
美国国会图书馆号码美国国会图书馆采用的书目资料分类方法。号码印于扉页背面。
The library of Congress is the largest library in the world, and it certainly has the biggest catalog system, called LOCIS.
国会图书馆是世界上最大的图书馆，它有着最大的目录系统，叫作LOCIS。
The library of Congress is the largest library in the world, and it certainly has the biggest catalog system, called LOCIS.
国会图书馆是世界上最大的图书馆，它有着最大的目录系统，叫作LOCIS。
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