delta
delta — 名詞
1. a wide, low-lying region near the end of a river, where the water spreads out in
三角洲
河流入海口的扇形沖積平原
a wide, low-lying region near the end of a river, where the water spreads out into many smaller waterways before emptying into the ocean or a lake
The Mekong delta in Vietnam is famous for its floating markets and rice paddies.
越南的湄公河三角洲以水上集市和稻田聞名。
proper noun + delta for a specific river-mouth region
After the flood, the river delta expanded several meters further into the sea.
洪水過後，這條河的三角洲又向海裡延伸了幾公尺。
Farmers in the Nile delta depend on seasonal floods to grow their crops.
尼羅河三角洲的農民靠季節性洪水來種植作物。
Eli spent two summers studying how sediment builds up in river deltas.
Eli 花了兩個夏天研究泥沙如何在河流三角洲堆積。
Wetland ecosystems in a delta provide habitats for hundreds of bird species.
三角洲的濕地生態系統為數百種鳥類提供了棲息地。
- river mouth
a more general term for where a river meets the sea; a delta is one type of river mouth
- alluvial plain
a broader geographic term referring to the flat land built up by river deposits; a delta is a specific kind of alluvial plain at the coast
- estuary
a funnel-shaped tidal river mouth, formed by erosion rather than sediment deposition — the opposite geological process
常見錯誤
2. the name of the fourth symbol (Δ, δ) in the Greek alphabet, used in writing mode
德爾塔
希臘字母表的第四個字母
the name of the fourth symbol (Δ, δ) in the Greek alphabet, used in writing modern and ancient Greek, and as a scientific symbol for change or difference
In physics class, the symbol delta (Δ) represents a change in value.
物理課上，德爾塔符號 (Δ) 代表數值的變化。
countable: the symbol delta
Wei practised writing the Greek letter delta during his first language lesson.
Wei 在第一堂希臘語課上練習寫希臘字母德爾塔。
collocation: Greek letter delta
The mathematical formula uses both delta and gamma to calculate the result.
這個數學公式同時使用德爾塔和伽馬來計算結果。
Rania learned that delta is the fourth letter of the Greek alphabet.
Rania 學到德爾塔是希臘字母表中的第四個字母。
A capital delta looks like a triangle with three sides of equal length.
大寫的德爾塔看起來像一個三邊等長的三角形。