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。
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.
从头开始搭建一个成功的线上社区需要大量的工作和计划。
Building a successful online community from scratch takes a lot of work and planning.
程序员可以从头开始创建新的报表，也可以将已有的报表导入到他们的工作区中。
Programmers can create new reports from scratch or import existing reports into their workspace.
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