elastic medium

例句：

1. 1. The elastic medium allowsthe molecules to move freely.
   这种弹性介质允许分子自由移动。
2. 2. Theelastic medium is used in various industries forits ability to stretch and recover.
   这种弹性介质被用于各种行业，因为它能够拉伸和恢复。
3. 3. Theelastic medium helps to reducestress on the material during use.
   这种弹性介质有助于在使用过程中减少对材料的应力。