这里按出现顺序将它们一一列出，并指出您应该注意的相关注释或警告。
These are listed below in the order of appearance, including any pertinent notes or caveats you should be aware of.
一个JPA实体中的注释，可以显示出表格的列，其他表格之间的关系，主关键字以及等等。
Annotations within a JPA entity can represent table columns, relationships to other tables, primary keys, and so on.
文法的程序规则返回散列引用，其中包含作为文本的代码、注释和字符串。
The grammar's program rule returns a hash reference with the code, comments, and strings available inside it as text.
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