除了按内容查询之外，还可以按元数据关键字，比如文件名、描述和创建日期来查找文件。
In addition to query by content, I can look for images by metadata keywords, such as filename, description, and creation date.
取而代之的是，只有包含关于数据的位置和长度的信息的描述符被追加到了套接字缓冲区。
Instead, only descriptors with information about the location and length of the data are appended to the socket buffer.
从技术的角度来看，倒排索引用于存储文档中出现的关键字，并且支持搜索，它是一种广为熟悉并且精确描述的数据结构。
From a technical perspective, the inverted index, used to store keywords that appear in documents and enable searches, is a well-known and well-described data structure.
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