@jmcrookston (Yeah, I know about HEPA on the plane, and also about there being plenty of time when they aren't even turned on.)
@jmcrookston（是的，我知道飞机上的 HEPA，而且还有很多时间甚至没有打开它们。）
@jmcrookston (Yeah, I know about HEPA on the plane, and also about there being plenty of time when they aren't even turned on.)
@jmcrookston（是的，我知道飞机上的 HEPA，而且还有很多时间甚至没有打开它们。）