ack on one's feet 经受打击后重新站起来
In fact, the highest part is 5,072 meters above sea level, making it the highest rail 22 ack on the 23 planet!
事实上，最高的地方海拔5,072公尺，所以这是地球上最高的铁路轨道！
Custom, with SACK: the last data set was gathered using the large window-inducing client while also including four SACK options on every ACK sent.
定制，启用SACK：最后的数据集使用了引入大窗口的客户机，同时也在每次发送ack时增加四个SACK选项。
A SACK receiver, on the other hand, can issue an ack for 1 plus a SACK option for packets 3 through 9.
另一方面，SACK接收方可以发出包1的ACK和包3到包9的SACK选项。
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