estuary deposit

例句：

1. 1. Estuaries are important habitats for many marine species.
   河口是许多海洋物种的重要栖息地。
2. 2. The study of estuary deposits helps us understand the impact of human activities on the environment.
   研究河口沉积物有助于我们了解人类活动对环境的影响。
3. 3. Estuary deposits can be used to study the history of the region's climate andgeology.
   河口沉积物可以用来研究该地区的气候和地质历史。