demifacet

例句：

1. 1. The crystal structure of the material is known to be semi-crystalline.
   这种材料的晶体结构已知是半晶质的。
2. 2.The study of semi-crystalline materials has significant applications in industry.
   半晶质材料的研究在工业中有重要应用。
3. 3. The process of producing semi-crystalline plastic involves melting and shaping.
   生产半晶质塑料的过程包括熔融和成型。