While these people are hard to find, they are worth their weight in gold once you find them.

虽然这些人很难发现，但是一旦你发现他们，他们拥有金子般重量的财富价值。

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Once you learn them, you will find what you seek in half the time, every time.

一旦你掌握了它，你将发现每次你只要花一半的时间就能找出你所需要的信息。

youdao

We also included some basic techniques you can probably use in every project you are developing, but which are hard to find once you need them.

这里还将包括一些你在日常的项目开发中经常用到的，但是你需要的时候又比较难以找到的一些基本技巧。

youdao

But I think once you start looking for them,you find them everyplace.

而且一旦查看起来，其实无处不在。

耶鲁公开课 - 死亡课程节选

But once you master them you'll find most of these options are easy to access with just a tap or two.

ENGADGET: ASUS VivoTab RT review: everything you loved about the Transformer tablets, but with Windows

Once you get the founder and CEO, you just want to find out what makes them tick.

FORBES: Tech Startup Secrets of Bill Campbell, Coach of Silicon Valley