VOA慢速英语:Polish Engineers Make Air-Cleaning Device

短语讲解：

1.This year, several hundred of these devices are being set up in the Polish town of Rybnik – a community known for its poor air quality.

set up 建立; 准备; 安排; 引起
例句：The two sides agreed to set up a commission to investigate claims
双方同意组建一个委员会来调查那些索赔要求。