Doctor Terry Pechacek at the C. D. C. says the findings should persuade every country that smoking in enclosed Spaces is very dangerous to nonsmokers.
疾控中心的TerryPechacek博士说，这些研究结果应该提醒每一个国家，在密闭环境中吸烟对于不吸烟者来说是非常危险的。
Doctor Terry Pechacek at the C. D. C. says the findings should persuade every country that smoking in enclosed Spaces is very dangerous to nonsmokers.
疾控中心的TerryPechacek博士说，这些研究结果应该提醒每一个国家，在密闭环境中吸烟对于不吸烟者来说是非常危险的。
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