filter spectro-photometer

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.
   科学家用一个过滤器来收集样本。
3. 3. The filter was so effective that it could catch even the smallest particles.
   这个过滤器非常有效，甚至能捕捉到最小的粒子。