The three gorges blocks are a double system, one for upstream traffic, and the other for downstream.

三峡船闸是双线系统，一条上行，一天下行。

youdao

Plug in a competitors domain and view the upstream sites to see where they're getting traffic from and the downstream sites to see what offers they're promoting.

塞在竞争对手域和视图上游网站看到他们得到流量和下游网站看看他们推广。

youdao

This protocol not only allocates upstream bandwidth dynamically, but also has the consistency of traffic management, high bandwidth efficiency and low cell delay.

本方案不仅能够灵活动态地分配用户上行接入的带宽，还具有统一的业务流管理、高带宽利用率和低信元时延等优点。

youdao

Uzbekistan has also unilaterally closed most border checkpoints with both upstream countries, set mines along parts of the boundary with Tajikistan, and often holds up commercial traffic.

ECONOMIST: Spats over control of water roil an already unstable region