filter crystal

例句：

1. 1.The filter crystals are used to remove impurities from the water.
   过滤器晶体用于从水中去除杂质。
2. 2. The filter crystals are made of a special material that can effectively trap dust particles.
   过滤器晶体由一种特殊材料制成，可以有效地捕捉尘埃颗粒。
3. 3.The filter crystals are designed to improve the quality of air in the room.
   过滤器晶体被设计用来改善房间内空气质量。