@FinchTH @Bob_Wachter @dr_kkjetelina Sure there are different ways of looking at it, that's one. Also being right in someone's face (or even a row away) requires more than the air being changed 4 mins later.
@FinchTH@Bob_Wachter@dr_kkjetelina当然有不同的方式来看待它，这就是其中之一。同时，直射某人的脸（甚至一排距离）需要的不仅仅是4分钟后换气。