humidifying

例句：

1. 1. The air in the room is too dry;we need to humidify it.
   房间里的空气太干燥了，我们需要加湿。
2. 2. Humidifying the air can help reduce allergies for people with asthma.
   加湿空气可以帮助哮喘患者减少过敏反应。
3. 3.To keep your plants healthy, you should humidify the soil regularly.
   为了保持你的植物健康，你应该定期给土壤加湿。