1. The Nile deltas are known for their fertile soil.
尼罗河三角洲以肥沃土壤闻名。

2. Many cities are built near river deltas.
许多城市建在河流三角洲附近。

3. The deltas formed slowly over thousands of years.
这些三角洲经过数千年逐渐形成。

4. Flooding often affects low-lying deltas.
洪水经常影响低洼的三角洲地区。

A: Why are deltas important for agriculture?
A：为什么三角洲对农业很重要？

B: Because deltas usually have very fertile soil.
B：因为三角洲通常拥有非常肥沃的土壤。

1) 河流入海口形成的三角洲地貌

2) 多分支或分流的地理区域

3) 常用于地理学中的沉积地形描述

1. 河流入海或入湖处形成的三角洲

e.g. The deltas of major rivers are densely populated.
主要河流的三角洲人口密集。

2. 因沉积作用形成的分支状地形区域

e.g. Sediments created large deltas at the river mouth.
沉积物在河口形成了大型三角洲。

noun

1. Plural form of delta; river mouth landforms formed by sediment deposition.