Researchers have found evidence to add hearing loss to secondhand smoke's growing list of negative health effects.

研究人员已有证据证明二手烟对健康的不良影响又新增一项损害听力。

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True, there is evidence that being near someone smoking, even outdoors, can result in significant secondhand smoke exposure.

诚然，有证据表明，待在吸烟者身旁，即便是在室外，也算接触到了二手烟。

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This [study] adds an important piece of evidence that inhaling secondhand smoke is deleterious and does things to the airway that are not good.

上述研究又提供了一个重要的证据证明吸入二手烟是有害的，对气道很不好。

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