filter ophthalmic lamp

例句：

1. 1. The filter is designed to remove impurities from the water.
   这个过滤器设计用来从水中去除杂质。
2. 2.The scientist used a filter to collect samples for analysis.
   科学家使用一个过滤器来收集样本进行分析。
3. 3.The filter was so effective that it reduced the amount of pollutants in the water by 90%.
   这个过滤器非常有效，将水中的污染物减少了90%。