plug scratch

基本解释

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。
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。