• Secondhand smoke is the combination of "sidestream" smoke (the smoke given off by a burning tobacco product) and "mainstream" smoke (the smoke exhaled by a smoker).

    二手包括“流烟”(烟草产品燃烧释放烟)主流烟”(吸烟者出的烟)。

    youdao

  • Secondhand smoke is the combination of "sidestream" smoke (the smoke given off by a burning tobacco product) and "mainstream" smoke (the smoke exhaled by a smoker).

    二手包括“流烟”(烟草产品燃烧释放烟)主流烟”(吸烟者出的烟)。

    youdao

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