The professor did exhaustive research before writing this article.

这位教授做了详尽的研究在写这篇文章之前。

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This is the second part of a two-part article investigating how use of TDD allows better design to emerge from the process of writing tests before you write code.

本文是分两部分的文章的第二部分，讨论如何使用TDD在编写代码之前编写测试，并通过这个过程形成更好的设计。

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Now, before I get any angry emails, let me state emphatically that I love my iPad (I'm currently writing this article on it on my flight back to Portugal).

现在，在你给我寄什么愤怒的电子邮件之前，让我强调一下我的声明：我喜欢我的iPad(我现在就在我回葡萄牙的飞机上用它写的这篇文章)。

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However, I have now spent the last few weeks before writing this article trying out what I am talking about before actually writing about it.

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Before writing this article, I gave Gary Vaynerchuk a test.

FORBES: Gary Vaynerchuk Practices What He Preaches

Typically this occurs (if at all) while writing the article not before you start.

FORBES: Fourteen Points On Growing A Blog