The mask itself can last for years, and you just pop in a new filter every few days.

口罩本身可以使用多年，你只要隔几天放一个滤芯进去就行了。

youdao

The mask itself can last for years, and you just pop in a new filter every few days.

口罩本身可以使用多年，你只要隔几天放一个滤芯进去就行了。

youdao