facial index

例句：

1. 1. The facial index of the new model is 0.25, which is significantly lower than the previous one.
   新型号的面部指数为0.25，显著低于前一个型号。
2. 2. The facial index is an important indicator for evaluating the health of the skin.
   面部指数是评估皮肤健康状况的重要指标。
3. 3. The facial index can be used to measure the amount of fat in the face and body.
   面部指数可以用来测量脸部和身体中的脂肪量。