如果在客户机可以跟踪发出的SACK选项的数目，则重传队列的大小可从扫描包计数器中计算得到。
The average size of the retransmit queue can be calculated from the packets scanned counter if the number of SACK options sent is also tracked at the client.
如果在客户机可以跟踪发出的SACK选项的数目，则重传队列的大小可从扫描包计数器中计算得到。
The average size of the retransmit queue can be calculated from the packets scanned counter if the number of SACK options sent is also tracked at the client.
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