A registry is like a library card catalog, used for recording the arrival of new books and other media, and looking up existing items.
注册中心就像一个图书馆的卡片目录，用来记录新书和其他媒体的入库情况并查找现有的项目。
Not too long ago, scientists had to hoof it to the library to review the literature. And they had to flip through a card catalog to find that dusty old volume with the article they wanted.
不久以前，科学家还不得不亲自到图书馆去查阅文献，在那里他们只能一张张翻阅目录索引以便从各种满是灰尘的合订卷中找到他们需要的文章。
I joined a team to prototype an online catalog for the library, sitting with librarians to learn how the card catalog system works.
我曾经加入一个团队来规划图书馆的在线编目系统，与图书管理人员坐在一起了解卡片编目系统是如何运作的。
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