知识贝壳
知识贝壳
所属栏目：英汉烟草科技
CasingThe solutions used contain mainly sugar and a humectant,both dissolved in water. The sugar helps overcome bitterness in the smoke andmakes it smoother. The humectant,usually glycerine or a higher glycol,serves to keep the tobacco moist and less sens ......（本文共 2893 字 ） [阅读本文] >>