sample

/ˈsæmpəl/

a small part of something intended as representative of the whole

中文释义：样本；样品

The researchers collected a soil sample from the Martian surface.

研究人员从火星表面收集了一份土壤样本。

A random sample of 500 participants was selected for the survey.

随机抽取了500名参与者作为调查样本。