Kitasato's filter

例句：

1. 1. The engineer designed a new filter to improve the efficiency of the water treatment plant.
   工程师设计了一种新的过滤器，以提高水处理厂的效率。
2. 2. The scientist used a Kitasato's filter to study the effects of pollution on fish populations.
   科学家使用一种Kitasato的过滤器来研究污染对鱼类种群的影响。
3. 3. The farmers used Kitasato's filters to purify the water for their crops.
   农民们使用Kitasato的过滤器来净化水，以供他们的农作物灌溉。