geologists studied the layers of alluvium to understand past climates.
地質學家研究了沖積層的層狀結構，以瞭解過去的氣候變化。
the river deposited vast amounts of alluvium downstream.
河流在下游沉積了大量的沖積物。
the ancient city was built on a foundation of alluvium.
這座古老的城市建在一個由沖積物構成的基礎上。
the floodwaters carried away topsoil, leaving behind a layer of alluvium.
洪水將表土帶走，留下了一層沖積物。
the study of alluvium provides valuable insights into river systems and landscapes.
對沖積物的研究爲河流系統和景觀提供了寶貴的見解。
geologists studied the layers of alluvium to understand past climates.
地質學家研究了沖積層的層狀結構，以瞭解過去的氣候變化。
the river deposited vast amounts of alluvium downstream.
河流在下游沉積了大量的沖積物。
the ancient city was built on a foundation of alluvium.
這座古老的城市建在一個由沖積物構成的基礎上。
the floodwaters carried away topsoil, leaving behind a layer of alluvium.
洪水將表土帶走，留下了一層沖積物。
the study of alluvium provides valuable insights into river systems and landscapes.
對沖積物的研究爲河流系統和景觀提供了寶貴的見解。
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