delta
含义: A flat, triangular area of land formed by sediment deposited where a river divides into smaller channels before entering the sea or a lake.
Deltas are among the most fertile and densely populated areas on Earth, supporting intensive agriculture and major cities. The Nile Delta and the Ganges-Brahmaputra Delta are famous examples. Deltas are also ecologically important as wetland habitats. The term derives from the triangular shape of the Greek letter delta. In mathematics and science, delta (symbol: lower-case or upper-case Greek letter) denotes change or difference.
例句
- The Nile Delta has been the breadbasket of Egypt for thousands of years, supporting agriculture with its rich alluvial soil. 数千年来,尼罗河三角洲凭借其肥沃的冲积土壤一直是埃及的粮仓。El delta del Nilo ha sido el granero de Egipto durante miles de años, sustentando la agricultura con su rico suelo aluvial.ナイルデルタは何千年もの間、肥沃な沖積土で農業を支え、エジプトの穀倉地帯であり続けてきました。나일강 삼각주는 수천 년간 비옥한 충적토로 농업을 뒷받침하며 이집트의 곡창 지대 역할을 해왔습니다.
- Rising sea levels pose a serious threat to low-lying delta regions across South and Southeast Asia. 海平面上升对南亚和东南亚低洼三角洲地区构成严重威胁。La subida del nivel del mar supone una grave amenaza para las regiones deltaicas de baja altitud del sur y sudeste de Asia.海面上昇は南アジアおよび東南アジアの低地のデルタ地帯に深刻な脅威を与えています。해수면 상승은 남아시아 및 동남아시아의 저지대 삼각주 지역에 심각한 위협을 가하고 있습니다.
- The river deposited vast quantities of sediment to form a wide, fertile delta at its mouth. 河流在入海口沉积了大量泥沙,形成了广阔肥沃的三角洲。El río depositó enormes cantidades de sedimentos para formar un amplio y fértil delta en su desembocadura.河川は河口に膨大な量の堆積物を運び、広く肥沃なデルタを形成しました。하천은 하구에 막대한 양의 퇴적물을 운반하여 넓고 비옥한 삼각주를 형성했습니다.
发音
用法指南
语境: academic, media
语气: neutral
起源与历史
From Greek delta, the fourth letter of the Greek alphabet (shaped like a triangle). The geographical sense was first used by the Greek historian Herodotus to describe the triangular shape of the Nile Delta.
文化背景
Era: Modern
Generation: All ages
Social background: Universal
更多同类表达
More from Geography & Planning