Since this is a retransmission, you do not time this segment for response time tracking (RTT) calculation.
由于算法不需要实时计算RTT值，因而有着较广的应用范围。
In view of the increasing number of river trade vessels operating between the Pearl River Delta and Hong Kong, the first dedicated River Trade Terminal (RTT) is being built at Tuen Mun in the north-west New Territories.
