basis material

例句：

1. 1. The new design uses a more basic material than the previous one.
   新设计使用了比之前更基础的材料。
2. 2.The construction of this bridge required the use of basic materials.
   建造这座桥需要使用基本材料。
3. 3.The research team focused on developing a basic material for biodegradable packaging.
   研究团队专注于开发一种生物降解包装的基本材料。