plotless sampling

例句：

1. 1. The company's decision to scrap the plotless sampling method was met with skepticism.
   该公司决定放弃无图抽样方法，这引起了人们的怀疑。
2. 2. The new software uses plotless sampling to improve data accuracy.
   新软件使用无图抽样技术来提高数据准确性。
3. 3. The scientist conducted plotless sampling to study the effects of pollution on marine life.
   科学家进行了无图抽样研究，以研究污染对海洋生物的影响。