Word · Frequency #7242
deltas
三角洲
deltas is the plural of delta.
a low triangular area of alluvial deposits where a river divides before entering a larger body of water
- 1.
The fourth letter of the modern Greek alphabet Δ, δ.
现代希腊字母表的第四个字母 Δ, δ
- 2.
The Delta variant of COVID-19.
新冠病毒的德尔塔变种
- 3.
A landform at the mouth of a river where it empties into a body of water.
河流入海口处的地貌
- 4.
The symbol Δ; A change in a quantity, likely from "d" for "difference".
符号 Δ；数量的变化,可能源于“d”代表“差异”
- 5.
The rate of change in an option value with respect to the underlying asset's price.
期权价值相对于基础资产价格的变化率
- 6.
A value in delta notation indicating the relative abundances of isotopes.
表示同位素相对丰度的δ值
- 7.
The set of differences between two versions of a file.
两个文件版本之间的差异集
- 8.
The angle subtended at the center of a circular arc.
圆弧中心的夹角
- 9.
A type of cargo bike that has one wheel in front and two in back.
一种前轮一个后轮两个的货运自行车
- 10.
The closed figure produced by connecting three coils or circuits successively, end for end, especially in a three-phase system.
通过依次连接三个线圈或电路形成的闭合图形,尤其在三相系统中
- 11.
a star that is usually the fourth brightest of a constellation.
通常是星座中第四亮的星
- 12.
one of four baryons consisting of up and down quarks with a combined spin of 3/2: Δ++ (uuu), Δ+ (uud), Δ0 (udd), or Δ− (ddd)
由上夸克和下夸克组成的四种重子之一,具有3/2的总自旋:Δ++ (uuu), Δ+ (uud), Δ0 (udd), 或 Δ− (ddd)
希腊字母的第四个字（Δ, δ）；三角形物体；现代希腊字母表的第四个字母 Δ, δ；新冠病毒的德尔塔变种；河流入海口处的地貌
In use
The Nile Delta is one of the most fertile regions in Egypt.
Many birds stop at the delta during their migration.
The delta provides rich soil for agriculture.
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。
delta + [noun] (triangular shape or Greek letter)
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。
Common mistakes
The river forms a delta at its mouth. Many large delta exist in Asia.
Connections
Collocations
- river delta
- 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。
- delta variant
- 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。
- delta force
- 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。
- delta wing
- 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。
- delta hedging
- 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。
Pop culture & quotes
Learner notes
Memory Tip
希腊字母Δ（三角形）形似河流冲积的三角洲，故名。
Context & Register
{"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。"}
Pronunciation & Spelling
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.
Usage priority
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.