secondhand evidence

基本解释

One US study found evidence of secondhand smoke in 60 percent of non-smokers.
一項美國的研究也發現了一些証據証明，二手菸吸菸者佔不吸菸者人數的60%。
The research adds to a growing body of evidence indicating that secondhand smoke has objectively measurable effects on children's heart health.
這項研究爲我們提供了新的証據，表明二手菸對兒童心髒健康的損害有可測量的客觀指標。
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個重要的証據証明吸入二手菸是有害的，對氣道很不好。
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