有时候一个集合可以表达一个数据库表，而一个资源可以表达成里面的一行记录，但是这并不是常态。
Occasionally, a Collection can represent a database table, and a Resource can represent a row within that table. However, this is not the usual case.
有时候一个集合可以表达一个数据库表，而一个资源可以表达成里面的一行记录，但是这并不是常态。
Occasionally, a Collection can represent a database table, and a Resource can represent a row within that table. However, this is not the usual case.
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