当PPE将一个数据字写入这个地址时，SPU就可以从对应的邮箱读通道中读取这个数据字的内容。
When the PPE writes a data word to that address, the SPU can read from its corresponding mailbox read channels.
检查标签中的列关键字，来确认列关键字已经被重新排序，并且与SQL查询返回的数据字段相符。
Check the column keys in the tag to make sure that the column keys are realigned to match the data fields returned by the SQL query.
SPU有一个读通道来从邮箱接收单个数据字，有两个写通道来发送数据字(更详细的介绍请参看下文)。
The SPU has a read channel for receiving a single data word from the mailbox and two write channels for sending data words (more on this below).
因此，在信号处理期间对时间要求严格 的响应仅仅限于当前对数据字进行处理的累加器级。
As a result, a time-critical response during signal processing is limited just to the accumulator stage which is currently processing the data word.
因此，在信号处理期间对时间要求严格 的响应仅仅限于当前对数据字进行处理的累加器级。
As a result, a time-critical response during signal processing is limited just to the accumulator stage which is currently processing the data word.
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