These functions involve direct interaction between users, back-end systems, and databases (the catalog).

这些功能涉及用户、后端系统和数据库（产品目录）之间的直接交互。

youdao

Above all, you must have a direct interaction with the people you imagine will buy your product, marketing experts say.

营销专家说，首先，你必须跟你认为会购买你的产品的消费者有直接沟通。

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Finally, I left the "Student" actor in the diagram, even though no direct interaction occurs at this point because this actor is referred to in the steps of the use case.

最后，即使在这时没有发生直接交互，我也保留了序列图中的“ Student ”参与者，因为这个参与者将在用例步骤中引用。

youdao

This allowed for direct interaction. The Webcast quickly became a forum where thousands tuned in to discuss policies and exchange ideas.

VOA: standard.2009.07.27

I wanted to learn about being more direct in interaction.

我想学一些更多的直接互动的东西。

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选

In fact, audiences both large and small thrive on direct interaction with a speaker.

FORBES: Why - and How - Your Audience Matters. 5 Blogs. 5 Ideas. 5 Days.

This land-based game drive is one of many ways that the Zambezi Queen brings guests into direct interaction with their environment.

BBC: Safari by water in southern Africa

That safeguard could help prevent the demeaning jokes or sexual harassment that would be possible if the scan viewer had direct interaction with the passenger.

FORBES: TSA Genitalia Jokes Bode Badly For Full-Body Airport Scans