卫生巾一般由表面层、吸收层和底层三部分构成，使用时就要从这三部分的材料及作用考虑。

Normally sanitary napkin is consists of surface layer, absorbent layer and bottom layer, so you have to consider the materials and functions in the above three layers.

youdao

卫生巾一般由表面层、吸收层和底层三部分构成，使用时就要从这三部分的材料及作用考虑。

Normally sanitary napkin is consists of surface layer, absorbent layer and bottom layer, so you have to consider the materials and functions in the above three layers.

youdao