WPI

例句：

1. 1. The WPI is a measure of the weight of a person's body.
   身体重量指数是衡量一个人体重的指标。
2. 2. The WPI has been used to estimate the health status of people in different countries.
   身体重量指数被用来估计不同国家人们的健康状况。
3. 3. The WPI is calculated by adding up all the weights of the individual's bones and muscles.
   身体重量指数是通过计算个体骨骼和肌肉的总重量得出的。