Although it helps to understand the math behind these engines, it's not necessary to use and enjoy them.

虽然理解这些引擎背后的理论会很有帮助，但不是必须要使用它们。

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You don't have to be an expert on your ebook subject, although it helps, as most information can be found online and in your local library.

你不必成为一个专家在您的电子书问题，尽管它帮助，因为大多数信息可在网上找到与您当地的图书馆。

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Although this procedure is quite simple, it helps you understand how to generate SQL-based procedures that query and return XML data using built-in wizards.

尽管该过程非常简单，但是也能帮助您理解如何使用内置向导生成基于SQL的过程来查询并返回XML数据。

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Oral bisphosphonates -- which include drugs such as Fosamax and Boniva -- can upset the stomach and cause acid reflux, although it helps to take the medication as directed.

CNN: Study: No esophageal cancer risk from bone drugs

Images from GQ's street style series and Citizen Couture's spotlight on fashion week could easily be mistaken for a fashion shoot, although it helps that everyone's so attractive.

CNN: The roundup: New York Fashion Week

Their reluctance to publicise this is understandable: although it helps them to hold on to business, it irks some of their big customers, whose own bids may be trumped by the service.

ECONOMIST: Stock exchanges