free-swelling index

例句：

1. 1. Thefree-swelling index is a measure of how quickly the water in the ocean rises when it's warmed by the sun.
   自由膨胀指数是一个衡量海洋在太阳加热时上升速度的指标。
2. 2. The free-swelling index is used to predict the likelihood of flooding in coastal areas.
   自由膨胀指数用于预测沿海地区洪水的可能性。
3. 3. The free-swelling index is also used to study the behavior of marine organisms in responseto changes in temperature and salinity.
   自由膨胀指数还被用来研究海洋生物对温度和盐度变化的反应行为。