elastic cross-section

例句：

1. 1. The material is elastic enough to stretch over a large gap.
   这种材料足够有弹性，可以拉伸过一个大缝隙。
2. 2. The rubber band is elastic and can be stretched easily.
   橡皮筋是弹性的，可以轻松拉伸。
3. 3. The fabric is elastic, so it will stretch with your movements.
   这种布料是弹性的，所以它会随着你的动作而伸展。