scavenging air

• 清除空气,清洗空气

scavenging air的用法和样例：

例句

1. As incomes go up, people often focus first on cleaning up their drinking water, and then later on air pollutants like sulfur dioxide.
   随着收入的不断增加，人们通常首先注意使自己的饮用水保持洁净，然后就会集中力量清除空气中的污染物，如二氧化硫。