The zip file that you can download at the bottom of the article has four Message Broker projects – two for each of the message flows mentioned above.

可从 文章底部下载的 zip 文件中 有四个 Message Broker 项目，如上面所述，每个信息流有两个项目前。

youdao

There are four types of channels on enterprise technology spillovers: Model and replication effects, competition effects, the associated effects, human capital flows.

外商企业技术外溢有四类渠道：示范和模仿效应、竞争效应、联系效应、人力资本流动。

youdao

There are business chain, funds chain, logistics chain and government affairs chain, called "Four chains of e-business", which are corresponding with the "Five flows of e-business".

目前的在线支付产业处于起步阶段，在线支付要求的“五流”和“四链”基本是出于断裂的状态，价值链断层。

youdao

In its recent negotiations, Google is pushing four key points: that free information flows are important for the global economy, that trade should not be restricted by the regulation of the Internet, that all players on the Web are treated fairly and that laws should be put in place to make any Internet restrictions transparent.

FORBES: Google's Free Trade Agenda

Rivers such as the Tyne, Ouse and Tone fell to their lowest and rose to their highest flows since records began, within a four-month period of the year.

BBC: Science & Environment

Hot Springs National Park officials closed the valves to spigots at four public access points, where the 143-degree mineral water normally flows.

CNN: Shutdown touches many lives across U.S.