“三角洲”造句

里奥格兰德河三角洲曾是一片遍布荆棘和沼泽的荒废之地。
The delta region of the Rio Grande river was a forsaken land of thickets and swamps.

在三角洲挖战壕有什么用?
What is the use of digging trenches in the Delta?

潮汐水道 、 三角洲和冲刷扇典型地与滨外砂洲伴生在一起.
Tidal channels, deltas, and washover fans are characteristically associated with offshore bars.

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