Because plug-ins must be attached to an existing component, they are not usually suitable for building new components from scratch.
插件必须被附加在一个现有组件中，因为它通常不适合从零开始构建新组件。
This approach, using open source software, is far more cost effective and flexible than creating (and testing and debugging) these plug-ins from scratch.
该方法，利用开源软件，比从头创建(并测试及调试)这些插件要节省成本并灵活。
Occasionally plug-ins must be created from scratch because no one in the open source community has needed to create on prior.
有时候必须从头创建插件，因为开源社区中没人需要预先创建。
Part 2 showed you how to develop the BuddyNote plug-in from scratch.
第 2部分 讨论了如何从头开发BuddyNote插件。
The sources for the plug-in are included in the Downloads section of the article, in case you would like to reuse them rather than starting from scratch. The main steps we document are these
该插件的源代码包含在本文的下载小节中，您可能希望重用它们而不是从头编写。
The sources for the plug-in are included in the Downloads section of the article, in case you would like to reuse them rather than starting from scratch. The main steps we document are these
该插件的源代码包含在本文的下载小节中，您可能希望重用它们而不是从头编写。
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