空气流通

• Keep windows open to maintain good indoor ventilation
  经常打开窗户，保持室内空气流通。
• Keep your home clean and well ventilated
  家居要保持空气流通及清洁卫生
• Often open all windows , make airiness
  经常打开所有窗户，使空气流通。
• Avoid visiting crowded or poorly ventilated places
  避免前往人多挤迫或空气流通不佳的地方。
• Avoid going to overcrowded and poorly ventilated places
  避免出入挤迫及空气流通欠佳的场所。
• Keep the household clean and maintain good indoor ventilation
  保持家居环境清洁和空气流通。
• There should be plenty of fresh air inside the shelter
  在房子里应该保持足够的新鲜空气流通。
• Please open the window to air the room
  请打开窗户让室内空气流通。
• Avoid crowded area , and maintain good ventilation at home
  避免污染空气，及保持家居空气流通。
• Keep windows open whenever possible to ensure good ventilation
  尽量打开车窗门，保持空气流通