sample-hold

例句：

1. 1. Before we can analyze the data, we need to sample the information from the database.
   在分析数据之前，我们需要从数据库中取样信息。
2. 2.The scientist held the sample for a few minutes before making a decision.
   科学家将样本保持了几分钟才做决定。
3. 3. The company samples its products in different markets to ensure quality consistency.
   该公司在不同市场对产品进行取样，以确保质量一致性。