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。
A registry is like a library card catalog, used for recording the arrival of new books and other media, and looking up existing items.
每个小卡片上记录了名称、职责和某些实体的合作者。
Each small card documents the name, responsibilities, and collaborators of some entity.
这些活动在卡片上记录下来，按照自然发生的顺序从左到 右排列。
These activities are recorded on cards and arranged from left to right in the order that they would naturally occur.
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