Incoming air must be filtered, and its temperature and humidity controlled.
入口的空气必须得到过滤，并且它的温度和湿度也要适当。
The idea being, when you breathe in deeply, the incoming air slightly cools the brain.
思路是，当你深呼吸时，吸入的空气会使大脑降温。
The idea being, when you breathe in deeply, the incoming air slightly cools the brain.
思路是，当你深呼吸时，吸入的空气会使大脑降温。
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