STI

例句：

1. 1.标准测试指标
   Standard Test Indicator
2. 2. 标准测试指数
   Standard Test Index
3. 3. 标准测试值
   Standard Test Value
4. 1. The STI value of the soil sample is 50.
   土壤样本的STI值为50。
5. 2.The STI index for this region has been rising steadily.
   该地区的STI指数一直在稳步上升。
6. 3. The STI value in this area is significantly higher than the national average.
   该地区的STI值明显高于全国平均水平。