local population sample

例句：

1. 1.To ensure the accuracy of our research, we need to collect a local population sample.
   为了确保我们研究的准确度，我们需要收集一个本地人口样本。
2. 2. The study aims to analyze the local population sample to understand the impact of COVID-19 on the community.
   这项研究旨在分析本地人口样本，以了解COVID-19对社区的影响。
3. 3. The government has collected a local population sample to monitor the spread of the virusin the city.
   政府已经收集了一个本地人口样本，以监测该病毒在城市中的传播情况。