phanerocrystalline

例句：

1. 1.The crystals are phanerocrystalline, which means they have a regular pattern of crystal growth.
   这些晶体是多晶体，意味着它们的晶体生长模式是规律的。
2. 2. In the field of materials science, polycrystalline is often used to describe a material that has multiple grains or crystals.
   在材料科学领域，多晶体通常用来描述具有多个晶粒或晶体的材料。
3. 3. The phanerocrystalline structure of the material is responsible for its high strength and toughness.
   这种材料的多晶体结构是其高强度和韧性的原因。