1
the delta of + [river]
表示河流入海处的三角洲，常用定冠词the。
The delta of the Nile is one of the most fertile regions in Egypt.
尼罗河三角洲是埃及最肥沃的地区之一。
三角洲
deltas — plural of delta
先理解核心含义，再看它在真实句子里的用法。
三角洲
a low triangular area of alluvial deposits where a river divides before entering a larger body of water
The delta of the Nile is one of the most fertile regions in Egypt.
尼罗河三角洲是埃及最肥沃的地区之一。
现代希腊字母表的第四个字母 Δ, δ
The fourth letter of the modern Greek alphabet Δ, δ.
新冠病毒的德尔塔变种
The Delta variant of COVID-19.
河流入海口处的地貌
A landform at the mouth of a river where it empties into a body of water.
符号 Δ；数量的变化,可能源于“d”代表“差异”
The symbol Δ; A change in a quantity, likely from "d" for "difference".
The Nile Delta is one of the most fertile regions in Egypt.
尼罗河三角洲是埃及最肥沃的地区之一。
Many birds stop at the delta during their migration.
许多鸟类在迁徙途中会在三角洲停留。
The delta provides rich soil for agriculture.
三角洲为农业提供了肥沃的土壤。
表示河流入海处的三角洲，常用定冠词the。
The delta of the Nile is one of the most fertile regions in Egypt.
尼罗河三角洲是埃及最肥沃的地区之一。
delta可修饰名词，表示三角形或希腊字母Δ的形状。
The aircraft has a distinctive delta wing design.
这架飞机具有独特的三角翼设计。
Not this
The river forms a delta at its mouth. Many large delta exist in Asia.
Use this
The river forms a delta at its mouth. Many large deltas exist in Asia.
Delta是可数名词，复数形式需加-s。中文中无复数标记，学习者容易遗漏。
Not this
The sail of the boat is a delta.
Use this
The sail of the boat is a triangle.
Delta特指等边三角形或河流三角洲，而一般三角形用triangle。受中文影响，学习者可能误用delta泛指所有三角形。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
河流三角洲
The Nile River delta is one of the most fertile regions in Egypt.
尼罗河三角洲是埃及最肥沃的地区之一。
德尔塔变异株
The delta variant of the virus spread rapidly across the globe.
该病毒的德尔塔变异株在全球迅速传播。
三角洲部队
Delta Force is an elite special operations unit of the U.S. Army.
三角洲部队是美国陆军的一支精锐特种作战部队。
三角翼
The Concorde had a distinctive delta wing design.
协和式飞机具有独特的三角翼设计。
德尔塔对冲
Delta hedging is used to reduce the risk of option positions.
德尔塔对冲用于降低期权头寸的风险。
德尔塔象限
The USS Voyager was stranded in the Delta Quadrant.
联邦星舰航海家号被困在德尔塔象限。
德尔塔-7型
Obi-Wan Kenobi flew a Delta-7 starfighter.
欧比旺·克诺比驾驶过德尔塔-7型星际战斗机。
Use deltas naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
希腊字母Δ（三角形）形似河流冲积的三角洲，故名。
{"register":"neutral","english_contexts":["geography","mathematics","Greek alphabet"],"chinese_contexts":["地理","数学","希腊字母"],"note_zh":"通常用于专业领域如地理学和数学，也指希腊字母Δ，日常口语中不常见。"}
None of these words rhyme with 'delta' (pronounced /ˈdeltə/) because their stressed vowels differ: they have /eɪ/ or /aɪ/, while 'delta' has /ɛ/. However, they all share the ending '-ta' and are useful spelling lookalikes.
Dictionary facts from ECDICT, WIKTIONARY.