After studying these products for several years, I wrote a book about how they do it.

经过对这些产品长达几年的研究，我写了一本关于它们是如何运作的书。

youdao

American has been studying this upgrade for more than two years and says it chose H-P after looking at every potential bidder and 15 airlines.

美国航空对这次系统升级已经研究了两年多时间，其表示，在对比每一家潜在的竞标者和15家航空公司之后选择了惠普。

youdao

I'm happy to report that after years of studying it, I've become fairly good at it (though happily failing all the time).

我很高兴地宣布，经过数年的研究之后我已在这方面变得相当在行了(尽管一直在失败着)。

youdao

We're also posting a practice exam for you to take, so after you're completely done your studying, it's good to have everything done before you take the practice exam, and then sit down just with this sheet here and your calculator, and ideally a timer, and make sure you can do the practice exam in the allotted amount of time.

我们还将给出一份模拟试题，因此在你完全复习好之后，最好先复习完,再做这份模拟试题，坐下来,只拿出这张表与计算器，最好还有个计时器，确保自己完成模拟题,在规定的时间内。

麻省理工公开课 - 化学原理课程节选

Singapore will give first-class passengers no ordinary bland flight cabin, but a plush wood-and-leather affair that it has designed after studying how the world's five-star hotels do it.

ECONOMIST: Asian airlines

The health secretary said he had reached the conclusion after studying the evidence, adding it was his personal view over what remains an "incredibly difficult question".

BBC: Abortion law: David Cameron has 'no plans' for new rules

After studying Google's revised policy in depth, the agency said it believed Google had failed to place any limit on the "scope of collection and the potential uses of the personal data", meaning it might be in breach of several of the bloc's data protection principles.

BBC: CNIL president Isabelle Falque-Pierroti