考虑一下加上边框，或者使用红色箭头而不是简单的黑点，Feldberg说。
Consider adding a border, or using a red arrow instead of a simple black dot, Feldberg says.
该模型包括一些基本的过程以及简单的有向图，这些边框控制着从一个活动到下一活动的处理逻辑流程。
It models the basic process and only simple directed edges that control the flow of processing logic from one activity to the next.
开始创作的话，只需要拿起一个铅笔先画几个简单的空方块代表你的浏览器外框、页面边框或任何你需要工作的东西。
To start the process, grab a pencil and draw several, small empty boxes to serve as your browser chrome, page bounds or whatever medium you happen to be working in.
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