Most free sites are supported by ads.

大多数免费网站靠广告资助。

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But owners of free sites say that is not necessarily so.

但是免费网站老板们说并不需要这么做。

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There are a number of inexpensive alternatives to the free sites.

廉价的图片站点还是不少的。

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But a lot of that market has moved to free or low-cost advertising on the Internet, including sites like Craigslist.

VOA: special.2009.03.21

A free service that makes money by advertising other sites has to find the right balance.

VOA: special.2010.05.28

Some materials are available free at Web sites like the Purdue Online Writing Lab,or OWL.

VOA: special.2010.02.11

The move was part of Cardiff and Vale University Health Board's policy of running smoke free sites.

BBC: Cardiff and Vale hospital fines 100 litter droppers

But owners of free sites say that is not necessarily so.

ECONOMIST: Online dating

Despite the demise of Napster's free-for-all format, the use of peer-to-peer technology and online music swapping remained a popular endeavor thanks to emerging free sites like KaZaA, Morpheus Music City and Audio Galaxy, to name just a few.

CNN: Top Technology Stories for 2001