口腔干燥

例句：

1. 1. She was so thirsty that her mouth felt dry.
   她渴得嘴唇都干了。
2. 2. The hot weather made him feel like his mouth was dry.
   炎热的天气让他感觉嘴巴很干。
3. 3. After drinking too much water, she felt her mouth was dry and needed to drink more.
   喝太多水后，她觉得嘴巴很干，需要再喝点水。