How much reading do you do outside the blogosphere? When did you last read a book?
除了博客之外你的阅读量有多少？你上一次读书又是什么时候？
The first is a simple text-based E-mail that simply lists the feeds to which a user has subscribed that have been updated since the user last read them.
第一种是基于简单文本的电子邮件，该邮件仅仅列出用户所订阅的、在上次阅读后已更新的提要。
This header is of particular benefit in a multi-client environment, as it can be used to delete or update an entry only if it hasn't already been changed since it was last read.
该头部在多客户端环境中尤其有用，因为它可用于删除或更新自上次读取以来未发生更改的条目。
An unrepeatable read can occur when the transaction reads some data again and finds that it changed since the last read due to another transaction that modified this data and committed.
事务再次读取某数据时发现它自最后一次读操作之后由于另一个事务修改并提交了该数据而发生了更改，则会发生不可重读。
By default, databases only track when a document was last modified, but by selecting the Maintain LastAccessed property option, the database can also track when a document was last read.
默认情况下，数据库只跟踪最近修改文档的日期，但是通过选择MaintainLastAccessed property选项，数据库也可以跟踪最近读取文档的时间。
By default, databases only track when a document was last modified, but by selecting the Maintain LastAccessed property option, the database can also track when a document was last read.
默认情况下，数据库只跟踪最近修改文档的日期，但是通过选择MaintainLastAccessed property选项，数据库也可以跟踪最近读取文档的时间。
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