Stuffing material可数吗

Stuffing material可数吗

通常用单数形式（不可数），只有在说明不同种类的 material 时才用复数形式。这一条适用于绝大多数不可数名词。如：
- What's the stuffing material in this pillow?
- It has two different types of stuffing materials in it, bamboo-fiber and cotton.

materials

stuffing material is natural 90% down 10% waterfowl 90%duvet 10%autres plumes 填充物为纯天然，90%羽绒，10%羽毛 90% down 10% waterfowl 是英语。waterfowl 是waterfowl feather的简写，羽毛的意思 90%duvet 10%autres plumes是法语，跟英语的意思相同