湿度学

例句：

1. 1. The room is too dry; we need to increase the humidity.
   房间太干燥了，我们需要增加湿度。
2. 2. Humidity levels in this region are quite high.
   该地区的湿度水平相当高。
3. 3. To maintain good health, it's important to keep indoor air humidity at a comfortable level.
   为了保持健康，室内空气湿度保持在舒适水平是很重要的。