矿井、通风
要知道污浊空气就是毒素，光明空气就是智慧。
You should know that polluted air is poison, and radiant air is wisdom.
车内空气循环系统不能彻底地清除逗留在车内的污浊空气。
In-car air circulation system can't entirely clean up dirty air lingering in cabins.
它们活在病毒萦绕的污浊空气里，每吸一口气，都暴露在病毒当中。
They live in air thick with viral loads, and they are exposed every time they breathe in.
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