hygroscopic state

例句：

1. 1. The material is hygroscopic, which means it absorbs moisture fromthe air.
   这种材料是吸湿性的，意味着它会从空气中吸收水分。
2. 2. In ahygroscopic state, the material canexpand and contract with changes in humidity.
   在吸湿状态下，该材料会随着湿度的变化而膨胀和收缩。
3. 3. The study ofhygroscopic materials is important for understandinghow they respond to changes in environmental conditions.
   研究吸湿性材料对于理解它们如何响应环境条件的变化非常重要。