CouchDB数据库中的所有数据都储存在一个文档中，并且每个文档可以由未定义的字段组成。

All data in a CouchDB database is stored in a document, and each document can be made up of an undefined number of fields.

youdao

可以为要使用但尚未定义的任何未定义类、构造函数、方法、属性、字段或枚举生成存根。

You can generate a stub for any undefined class, constructor, method, property, field, or enum that you want to use but have not yet defined.

youdao