elastic grinding stone

例句：

1. 1.The material is elastic, so it can stretch and return to its original shape.
   这种材料是弹性的，所以它可以拉伸并恢复到原始形状。
2. 2. The rubber band is elastic, which makes it easy to stretch and hold.
   橡皮筋是弹性的，这使得它容易拉伸和保持。
3. 3. The car tires are elastic, which helps them grip the road better.
   汽车轮胎是弹性的，这有助于它们更好地抓地。