polycrystalline

• 指由许多小晶体（晶粒）组成的固体材料，这些晶粒的大小和取向各不相同，常用于材料科学与工程领域。

Describes a solid material composed of many crystallites of varying size and orientation, commonly used in materials science and engineering.

1. Composed of many crystalsC1formalscientific

   Describes a solid material that is made up of many small crystals or crystallites, rather than a single large crystal.

   多晶的

   • Polycrystalline silicon is widely used in solar panels.
   • The metal sample had a polycrystalline structure visible under a microscope.
   • Polycrystalline materials often have different properties than single crystals.