随着空气质量的下降，戴口罩成为人们保护呼吸道最直接有效的方法，那么如何正确挑选优质的、适合自己的口罩，你知道吗？
With the decline of air quality, wearing masks has become the most direct and effective way for people to protect their respiratory tract, so how to choose the right quality mask that suits them, do you know?
