delta

简明释义

英[ˈdeltə]美[ˈdeltə]

n. 希腊字母表的第 4 个字母；三角洲；<英>（论文、考试成绩等的）δ等，丁等；丁，δ项，δ类 （一系列项目、分类中的第四位）；（Delta，天文）δ星（星座中第四颗星，通常亮度也居第四位）；（无线电通讯中字母D的代码词）Δ，δ

【名】 （Delta）（英、罗、葡）德尔塔（人名）

复 数 d e l t a s

英英释义

单词用法

同义词

反义词

例句

1.The oil slick can be seen just beyond the delta.

你可以看到浮油就在三角洲门口。

2.Palm, Coconut, keora, agar, also grow in some parts of the delta.

棕榈树、椰子、椰菜、琼脂也生长在三角洲的一些地方。

3.They had moved the capital up to the Delta region.

他们已经将首都迁移至三角洲地区。

4.Located on the Mediterranean just two hours south of Barcelona, the Ebro Delta produces 120 million kilograms of rice a year, making it one of the continent's most important rice-growing areas.

埃布罗三角洲位于地中海，距巴塞罗那南部仅两小时车程，当地的稻米年产量是1.2亿公斤，是欧洲大陆最重要的稻米产区之一。

5.The delta region of the Rio Grande river was a forsaken land of thickets and swamps.

格兰德河的三角洲地区是块布满了灌木丛及沼泽地的被遗忘之地。

6.The Ebro Delta, in Spain, famous as a battleground during the Spanish Civil War, is now the setting for a different contest.

西班牙的埃布罗河三角洲因曾为西班牙内战期间的战场而出名，现在又成为另一场战争的所在地。

7.For now, the giant apple snail's foothold in Europe is limited to the Ebro Delta.

到目前为止，巨型苹果蜗牛在欧洲仅存在于埃布罗河三角洲。

8.The delta in the river formed a rich ecosystem.

这条河的三角洲形成了一个丰富的生态系统。

9.The delta sign in mathematics represents a change or difference.

数学中的德尔塔符号表示变化或差异。

10.In finance, the delta of an option measures its sensitivity to changes in the price of the underlying asset.

在金融中，期权的德尔塔衡量其对基础资产价格变化的敏感性。

11.Geologists study the formation of a delta at the mouth of rivers.

地质学家研究河流入海口的三角洲形成。

12.The delta variant of the virus spread rapidly across the globe.

德尔塔变种病毒迅速传播到全球。

作文

The term delta refers to a landform that typically forms at the mouth of a river where it meets a body of water, such as an ocean, sea, or lake. This geographical feature is created by the deposition of sediment carried by the river as the flow velocity decreases upon entering standing water. The delta is characterized by its triangular or fan-shaped appearance, resembling the Greek letter 'Δ' from which it derives its name. Deltas are not only significant for their unique shape but also for their ecological importance and their role in human civilization. One of the most famous examples of a delta is the Nile Delta in Egypt, which has been crucial for agriculture and settlement since ancient times. The fertile lands of the delta support a variety of crops, thanks to the nutrient-rich silt deposited by the Nile River. Similarly, the Mississippi River Delta in the United States is known for its rich biodiversity and complex ecosystems, including wetlands and estuaries that provide habitat for numerous species of fish, birds, and other wildlife. Deltas are dynamic environments that are constantly changing due to natural processes such as erosion, sedimentation, and the influence of tides and storms. Human activities, such as dam construction and land reclamation, can also significantly impact the health and stability of a delta. For instance, the construction of dams upstream can reduce sediment flow to the delta, leading to land loss and increased vulnerability to flooding. In addition to their environmental significance, deltas often serve as vital economic hubs. Many cities have developed around these regions due to their strategic location for trade and transportation. The combination of freshwater from rivers and saltwater from the sea creates rich fishing grounds, making deltas essential for local economies. Furthermore, they often attract tourism due to their natural beauty and recreational opportunities.However, the future of many deltas is under threat due to climate change, rising sea levels, and urbanization. As global temperatures rise, the melting of polar ice caps contributes to higher sea levels, which can inundate deltas and displace communities. Additionally, the increased frequency and intensity of storms pose risks to these vulnerable areas. It is crucial to implement sustainable practices to protect and preserve deltas for future generations.In conclusion, the concept of delta encompasses much more than just a geographical feature; it represents a complex interplay of ecological, economic, and social factors. Understanding the importance of deltas can help us appreciate their role in our world and motivate us to take action to safeguard these vital landscapes. Through conservation efforts and sustainable development, we can ensure that deltas continue to thrive and support both nature and humanity for years to come.

术语delta指的是一种地貌，通常形成在河流的入海口，当河流与海洋、湖泊或其他水体相遇时。这个地理特征是由河流携带的沉积物在进入静水后流速降低时沉积而成的。delta的特点是其三角形或扇形的外观，类似于希腊字母“Δ”，因此得名。delta不仅因其独特的形状而重要，还因其生态重要性和在人类文明中的作用而受到重视。最著名的delta之一是埃及的尼罗河三角洲，自古以来就对农业和定居至关重要。由于尼罗河沉积的富含营养的淤泥，delta的肥沃土地支持着各种作物。同样，美国的密西西比河三角洲以其丰富的生物多样性和复杂的生态系统而闻名，包括湿地和河口，为许多鱼类、鸟类和其他野生动物提供栖息地。delta是动态环境，因自然过程如侵蚀、沉积以及潮汐和风暴的影响而不断变化。人类活动，如修建大坝和填海造地，也会显著影响delta的健康和稳定。例如，上游大坝的建设可能减少流向delta的沉积物，导致土地流失和洪水风险增加。除了环境意义外，delta通常作为重要的经济中心。许多城市围绕这些地区发展，由于其在贸易和运输中的战略位置。淡水和海水的结合创造了丰富的渔场，使得delta对当地经济至关重要。此外，由于其自然美景和休闲机会，它们往往吸引旅游。然而，许多delta的未来正面临气候变化、海平面上升和城市化的威胁。随着全球气温上升，极地冰盖的融化导致海平面上升，这可能淹没delta并使社区流离失所。此外，风暴的频率和强度增加也对这些脆弱地区构成风险。实施可持续实践以保护和保存delta对未来几代人至关重要。总之，delta的概念不仅仅涵盖一个地理特征；它代表了生态、经济和社会因素之间的复杂相互作用。理解delta的重要性可以帮助我们欣赏它们在我们世界中的角色，并激励我们采取行动保护这些重要的景观。通过保护努力和可持续发展，我们可以确保delta继续繁荣并支持自然和人类，造福未来。