Open source software is a wonderful resource because it allows developers to reuse existing code to fill specific needs rather than write new software from scratch.

开源软件是极好的资源，因为它让开发人员复用现有的代码来满足具体的需求，而不是从零开始写新的软件。

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Some people have argued that no one could have done an open source operating system "from scratch" - without the existence of other systems for the infrastructure work.

有些人认为没有人可以“从头开始”开发开源操作系统—在没有针对基础设施工作的其他系统的情况下。

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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。

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With projects such as Meixi Lake City, starting from scratch brings significant benefits not open to -- easily at least -- existing conurbations, such as combining water transport with energy production, superior flood prevention and urban agriculture.

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Typically, charter operators open new schools from scratch, Mr. Chester said.

WSJ: New Front in Charter Schools

So I'm going to be starting from scratch in the sense that I will be open to any ideas that help promote these goals.

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