Use a Humidifier
使用加湿器
Run a humidifier during months when natural humidity is low.
冬天空气中的自然湿度会比较低，所以记得使用加湿器。
Place your humidifier in the room you spend the most time in. You should clean your humidifier on a regular basis to prevent bacteria and mold growth.
把加湿器放在你待的时间最长的房间里。要定期清洗加湿器，避免细菌滋生。