It was and is no secret, as BAT points out, that people smoke low-tar cigarettes differently from high-tar ones.

正如英美烟草公司所指出，人们吸低焦油含量香烟的感觉不同于高焦油含量香烟，这在过去和现在都不是什么秘密。

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If so, then deeply inhaled smoke from low-tar-delivery cigarettes might be more harmful than uninhaled smoke from high-tar cigarettes.

若果真如此，从低焦油卷烟中深深吸入的烟对人的危害可能比高焦油卷烟中未被吸入的烟更大。

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Regardless of how this came about, the irony is that low-tar brands may have ended up causing more health problems than high-tar ones.

不管真相如何，具有讽刺意味的是，低焦油牌香烟也许比高焦油牌香烟更有害于健康。

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America's National Cancer Institute has said that people who smoke low-tar cigarettes do not reduce their risk of getting diseases linked to smoking.

VOA: special.2010.03.09

With counsel from TIRC, tobacco companies began mass-marketing filtered cigarettes and low-tar formulations that promised a "healthier" smoke.

CNN: A brief history of tobacco

The use of terms such as low-tar is set to be banned from September 2003 under a European Union directive.

BBC: Women 'conned' by low tar cigarettes

It said the law will give the FDA the power to restrict advertising, stop illegal sales of tobacco products, require graphic health warnings that cover the top half of the front and back of cigarette packs, ban misleading health claims such as "light" and "low-tar, " regulate health claims, require disclosure of the contents of tobacco products, require changes in tobacco products.

CNN: Senate passes bill increasing FDA power over tobacco products