elongation index

例句：

1. 1. Thenew material has a high elasticity index, making it suitable for use in variousapplications.
   这种新材料具有高弹性指数，适用于各种应用。
2. 2. In the study of materials science, the elongation index is animportant parameter to measure the flexibility of materials.
   在材料科学研究中，伸长指数是衡量材料柔韧性的重要参数。
3. 3. The elongation index can be used to predictthe performance of the material under different conditions.
   伸长指数可以用来预测材料在不同条件下的性能。