In this case, the gateway is, in effect, the service provider and simply makes use of the downstream service as part of the implementation of the service it's exposing.
在本例中，网关是有效的服务提供者，并简单地利用下游的服务作为它所提供服务的一部分。
2
The design considers the integral effect of the upstream headwater channel and downstream scout gallery.
本设计考虑了上游引水渠和下游冲沙廊道布置对漏斗水流整体的影响。
3
In this model the effect of downstream congestion on the upstream flow is considered.