空气流通

fresh air / draft

empty / air / sky / in vain

to empty / vacant / unoccupied / space / leisure / free time

air / atmosphere

gas / air / smell / weather / to make angry / to annoy / to get angry / vital energy / qi

gas; air / smell / weather / to make angry; to annoy; to get angry / vital energy; qi

flow of air / draft

stream of air / airflow / slipstream / draft / breath / turbulence (of aircraft)

to flow / to disseminate / to circulate or spread / to move or drift / to degenerate / to banish or send into exile / stream of water or sth resembling one / class, rate or grade

to circulate / to distribute / circulation / distribution

to circulate; to distribute / circulation; distribution

to go through / to know well / (suffix) expert / to connect / to communicate / open / to clear / classifier for letters, telegrams, phone calls etc

classifier for an activity, taken in its entirety (tirade of abuse, stint of music playing, bout of drinking etc)