这位教授做了详尽的研究在写这篇文章之前。
The professor did exhaustive research before writing this article.
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)。
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).
本应该两星期之前开始写这篇文章，而事实上我现在才开始。
I should have started this article two weeks before I actually did.
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