FCA

例句：

1. 1. The FCA is a standardized format for storing and retrieving data in a database.
   FCA是存储和检索数据库中数据的标准格式。
2. 2. The FCA is used to define the structure of a document, such as a report or an article.
   FCA用于定义文档的结构，如报告或文章。
3. 3. The FCA is also used to define the relationships between different parts of a document, such as headings and subheadings.
   FCA还用于定义文档不同部分之间的关系，如标题和子标题。