As a product that is being smoked it will naturally benefit from these flavours which can nicely enhance the malty, bread like, roasted character of main stream smoke.

作为一种吸食性产品，这些香料可以增加香烟的自然芬芳，使主流烟气的味道就像麦芽糖、面包和烘烤食品的味道一样。

youdao

Conclusion porphyrin and ferriporphyrin presented significant effectiveness on removal of nitrogen oxides in tobacco smoke main stream.

结论卟啉和铁卟啉对卷烟主流烟气中氮氧化物有明显的截留效果。

youdao