英语语法分析

Clinically tested for skin irritancy and allergy.

经过皮肤刺激性和过敏性测试。

Can it be used during irritancy? How is the effect?

烦闷时可否使用？效果如何？

Potassium content increased in tobacco leaf, the nitrogenous substances decreased, irritancy reduced and aroma increased.

烟叶钾含量增加，含氮化合物下降，刺激性减小，香气增加。