sample arithmetic mean

例句：

1. 1. We need to sample the new product before we decide on a full-scale production.
   在决定全面生产之前，我们需要先对新产品进行抽样测试。
2. 2. The company decided to sample its employees for a new training program.
   该公司决定对其员工进行新培训项目的抽样测试。
3. 3.The scientist sampled the soil and tested it for pH levels.
   科学家采集土壤样本并测试其酸碱度。