In this case updates of the extension require manualcommunication to the extension users.
在这种情况下，想要更新扩展，你需要手动地与扩展用户沟通。
2
It encourages communication by making your programs self-documenting-the set of tests you develop show how the code works in a way that a manual can't.
你开发的一系列测试说明了代码的运行机制，这种程序自我编档的方式促进了交流。
3
Communication channel constraints including automatic and manual (UI) interfaces.