You can save yourself a significant amount of time and energy by using an existing tag library rather than creating everything from scratch.

使用现有的标记库而不是从头创建所有东西会使您节省大量时间和精力。

youdao

When an enterprise begins the transition to an SOA, it is impractical to throw away all the existing systems and rebuild everything from scratch.

当企业开始向SOA过渡时，抛开所有现有系统并重新从头构建所有内容的做法并不实际。

youdao

The reuse issue is absolutely critical — it would be insane to write everything from scratch for each application, because it would take too long to redevelop each component.

重用的问题相当关键——为每个应用程序都从新开始编写所有的内容是非常愚蠢的，因为重新开发每个组件会花费太长时间。

youdao

But you'll see that once you get to final projects frankly, you're not gonna want to implement everything from scratch.

但是一旦你得出了最终方案，你就不会愿意利用框架去,实现任何功能了。

哈佛公开课 - 计算机科学课程节选

Because you won't want to do everything from scratch yourself, you want to be able to look at what is being created by somebody else and understand what is inside of there, whether it works correctly and how you can build on it This is one of the few places where plagiarism is an OK thing.

因为你们不会想无论做什么事情,都由你们自己亲自上阵，你们希望有能力读懂,别人创造的语言,并了解其中的内涵，运转的正确性和如何在其基础之上继续发展,这是为数不多的,合理的作弊行为之一。

麻省理工公开课 - 计算机科学及编程导论课程节选

Panorama spoke to several problem gamblers, addicted to everything from scratch cards to online slot machines, and high stakes gaming terminals.

BBC: Gambling addict tells of fight to save family life

Instead of writing everything from scratch, APIs provide libraries of predefined functions and commands that serve as reliable shortcuts for developers.

FORBES: With All Content Moving Mobile, Karen McGrane Writes, The API's The Thing

Fortunately, we did start to get orders pretty quickly, and our initial decisions had put us on the right track to grow without needing to rebuild everything from scratch.

FORBES: How to set up an online store, Part 1