hard brittle material的用法和样例：
例句
- The validity of this method has been confirmed by analyzing residual Vickers indent on quasi-plastic ceramic and brittle glass respectively.
基于这些创新理论，研制了不同类型的脆性材料性能测试仪。 - Concrete is a kind of brittle material, increasing its strength will result in the rising of brittleness, which restrict its further application in engineering structures.
混凝土是一种脆性材料，当提高其强度时，它的脆性会有较大幅度增大，这限制了它在工程结构中的进一步应用。
