空氣流通 kōng qì liú tōng

DEFINITIONS

  1. fresh air
  2. draft

CHARACTERS

空 kōng
HSK 3
empty, hollow, bare, deserted
氣 qì air, gas, steam, vapor; spirit
流 liú
HSK 4
flow, circulate, drift; class
通 tōng
HSK 4
pass through, common, communicate