secondhand evidence

基本解释

One US study found evidence of secondhand smoke in 60 percent of non-smokers.
一项美国的研究也发现了一些证据证明，二手烟吸烟者占不吸烟者人数的60%。
The research adds to a growing body of evidence indicating that secondhand smoke has objectively measurable effects on children's heart health.
这项研究为我们提供了新的证据，表明二手烟对儿童心脏健康的损害有可测量的客观指标。
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。
www.chinadaily.com.cn