geologists studied the layers of alluvium to understand past climates.
地质学家研究了冲积层的层状结构，以了解过去的气候变化。
the river deposited vast amounts of alluvium downstream.
河流在下游沉积了大量的冲积物。
the ancient city was built on a foundation of alluvium.
这座古老的城市建在一个由冲积物构成的基础上。
the floodwaters carried away topsoil, leaving behind a layer of alluvium.
洪水将表土带走，留下了一层冲积物。
the study of alluvium provides valuable insights into river systems and landscapes.
对冲积物的研究为河流系统和景观提供了宝贵的见解。
geologists studied the layers of alluvium to understand past climates.
地质学家研究了冲积层的层状结构，以了解过去的气候变化。
the river deposited vast amounts of alluvium downstream.
河流在下游沉积了大量的冲积物。
the ancient city was built on a foundation of alluvium.
这座古老的城市建在一个由冲积物构成的基础上。
the floodwaters carried away topsoil, leaving behind a layer of alluvium.
洪水将表土带走，留下了一层冲积物。
the study of alluvium provides valuable insights into river systems and landscapes.
对冲积物的研究为河流系统和景观提供了宝贵的见解。
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