sediment sample

例句：

1. 1. The geologist collected a sediment sample from the riverbed to analyze its composition.
   地质学家从河床上采集了沉积物样本，以分析其成分。
2. 2.The research team used sediment samples from different locations to study the effects of pollution on marine ecosystems.
   研究团队使用来自不同地点的沉积物样本来研究污染对海洋生态系统的影响。
3. 3. The scientist conducted a sediment sample analysis to determine the age and origin of the rocks.
   科学家进行了沉积物样本分析，以确定岩石的年龄和来源。