equal falling ratio

例句：

1. 1. The engineer calculated the equal falling ratio of the materials to determine their strength.
   工程师计算了材料的等效下降比例以确定其强度。
2. 2. In the study, we found that the equal falling ratio of the two materials was significantly different.
   在研究中，我们发现两种材料的等效下降比例显著不同。
3. 3. The equal falling ratio is a critical factor in determining the efficiency of the machine.
   等效下降比例是决定机器效率的关键因素。