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。
Tabbed environment with features such as extendible multi-language support, pop-up filter, plug-ins, skin support.
环境的功能，如标签式伸缩的多语言支持，弹出式过滤器，插件，皮肤支持。
Tabbed environment with features such as extendible multi-language support, pop-up filter, plug-ins, skin support.
环境的功能，如标签式伸缩的多语言支持，弹出式过滤器，插件，皮肤支持。
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