Definition: a small number of people from a larger group that is being tested or considered Level: B2
研究人员为调查随机选择了一组选民样本。
Researchers selected a random ___sample of voters for the survey.
该研究使用了全国代表性的200所学校样本。
The study used a nationally representative ___sample of 200 schools.
这份报告基于超过50名学生的样本。
This report is based on a ___sample of over 50 students.
