ideal crystal

例句：

1. 1.The ideal crystal is a rare material that can be used for cutting and polishing purposes.
   理想晶体是一种稀有材料，可用于切割和抛光。
2. 2. The discovery of this new type of crystal has sparked interest in the field of materials science.
   这种新型晶体的发现激发了材料科学领域的研究兴趣。
3. 3.The ideal crystal was used to create intricate designs on ancient jewelry.
   理想晶体被用于古代珠宝上创造出复杂的图案。