elastic elongation

例句：

1. 1.The spring in the rubber band is elastic elongation.
   橡皮筋中的弹簧是弹性伸长。
2. 2.The material has excellent elastic elongation.
   这种材料具有极好的弹性伸长。
3. 3. The car's suspension system has a lot of elastic elongation.
   汽车的悬挂系统有很多弹性伸长。