filter leaf for residual

例句：

1. 1.The filter leaf is used to remove impurities from the water.
   过滤叶用于从水中去除杂质。
2. 2. The filter leaf is an essential part of the water filtration system.
   过滤叶是水过滤系统的重要组成部分。
3. 3. The filter leaf is made of a special material that can effectively trap particles.
   过滤叶是由一种特殊材料制成的，可以有效地捕捉颗粒物。