消防员进入充满烟雾的建筑时都会佩戴防毒面具。

Firefighters always wear ___gas masks when entering smoke-filled buildings.

良好的教育就像一个防毒面具，保护年轻人免受网络虚假信息的影响。

A good education acts like a ___gas mask, protecting young people from online misinformation.