sediment

简明释义

英[ˈsedɪmənt]美[ˈsedɪmənt]

n. 沉淀物，沉渣；（最终形成岩石层的沙、石等）沉积物

v. （液体）沉淀；沉积

复 数 s e d i m e n t s

第 三 人 称 单 数 s e d i m e n t s

现 在 分 词 s e d i m e n t i n g

过 去 式 s e d i m e n t e d

过 去 分 词 s e d i m e n t e d

英英释义

单词用法

同义词

反义词

例句

1.Most desert streambeds are normally dry, but they occasionally receive large flows of water and sediment.

大多数沙漠河床通常是干燥的，但它们偶尔也会有大量的水流和沉积物。

2.These seas have a typical oceanic floor, except that the floor is overlaid by several kilometers of sediment.

这些海洋有一个典型的海底，只不过这个海底被几公里厚的沉积物覆盖。

3.This sediment layer is enriched in the rare metal iridium and other elements that are relatively abundant in a meteorite but very rare in the crust of Earth.

这一沉积层富含稀有金属铱，以及其他在陨石中较丰富而在地壳中十分罕见的元素。

4.The sample consisted of pebbles of hardened sediment that had once been soft, deep-sea mud, as well as granules of gypsum and fragments of volcanic rock.

这一样本包括曾经柔软的的硬化沉积物的卵石、深海淤泥以及石膏颗粒和火山岩碎片。

5.Others point out that decreased sediment loads will likely lead to erosion of downstream riverbanks and the Mekong Delta.

其他人指出，泥沙负荷的减少可能会导致下游河岸和湄公河三角洲的侵蚀。

6.Samples recovered from the expedition revealed important differences in chemical composition and fossil distribution among the sediment layers.

探险队采集的样品揭示了沉积物层之间化学成分及化石分布上的重大差异。

7.The river water was murky due to the high amount of sediment 沉淀物 carried downstream.

由于大量的沉淀物被带到下游，河水变得浑浊。

8.After the rain, we noticed a layer of sediment 沉淀物 on the bottom of the pond.

下雨后，我们注意到池塘底部有一层沉淀物。

9.Geologists study sediment 沉淀物 layers to understand Earth's history.

地质学家研究沉淀物层以了解地球的历史。

10.The wine had a rich flavor, but there was some sediment 沉淀物 at the bottom of the bottle.

这款葡萄酒味道浓郁，但瓶底有一些沉淀物。

11.The scientist collected samples of sediment 沉淀物 from the ocean floor for analysis.

科学家从海底收集了沉淀物样本以进行分析。

作文

Sediment, defined as the particles that settle at the bottom of a liquid, plays a crucial role in various natural processes and human activities. In rivers, lakes, and oceans, sediment (沉积物) is constantly being transported by water flow, shaped by the forces of nature. Understanding sediment (沉积物) can provide insights into environmental changes, ecological health, and even human impact on landscapes. In the context of rivers, sediment (沉积物) is often formed from weathered rocks and organic material. As water flows over land, it erodes these materials and carries them downstream. This process is vital for creating fertile floodplains, as the sediment (沉积物) deposited during floods enriches the soil, promoting agriculture. However, excessive sediment (沉积物) runoff due to deforestation and urbanization can lead to problems such as reduced water quality and habitat destruction. In aquatic ecosystems, sediment (沉积物) serves as a habitat for various organisms. Tiny creatures like worms, insects, and microorganisms thrive in the sediment (沉积物), playing essential roles in nutrient cycling. Additionally, larger animals, such as fish, rely on sediment (沉积物) for breeding grounds and food sources. The health of these ecosystems is closely linked to the quality and quantity of sediment (沉积物) present. Human activities have a significant impact on sediment (沉积物) dynamics. Construction projects, mining, and agricultural practices can increase sediment (沉积物) runoff, leading to siltation in rivers and lakes. This can disrupt aquatic habitats and reduce biodiversity. Moreover, increased sediment (沉积物) can affect water quality by introducing pollutants and reducing light penetration, which is essential for aquatic plants. On the other hand, sediment (沉积物) is also utilized in various human endeavors. For example, in civil engineering, sediment (沉积物) can be used to create landfills or to restore eroded areas. In some regions, sediment (沉积物) is harvested for construction materials, such as sand and gravel. These practices highlight the dual nature of sediment (沉积物), where it can be both a resource and a challenge. Furthermore, the study of sediment (沉积物) is essential for understanding geological history. Layers of sediment (沉积物) can reveal information about past climates, natural disasters, and the evolution of landscapes. Geologists analyze sediment (沉积物) cores from the ocean floor or lake beds to reconstruct historical data, providing valuable insights into how our planet has changed over millennia. In conclusion, sediment (沉积物) is more than just dirt at the bottom of a body of water; it is a fundamental aspect of our environment that influences ecological health, human activity, and geological processes. By understanding the importance of sediment (沉积物), we can better appreciate the delicate balance of our ecosystems and the need for sustainable practices to protect our natural resources.

沉积物，定义为沉淀在液体底部的颗粒，在各种自然过程和人类活动中扮演着至关重要的角色。在河流、湖泊和海洋中，沉积物（沉积物）不断被水流运输，受到自然力量的影响。理解沉积物（沉积物）可以提供对环境变化、生态健康，甚至人类对景观影响的洞察。 在河流的背景下，沉积物（沉积物）通常由风化的岩石和有机物质形成。当水流过土地时，它侵蚀这些材料并将其带到下游。这个过程对于创造肥沃的冲积平原至关重要，因为在洪水期间沉积的沉积物（沉积物）丰富了土壤，促进了农业。然而，由于森林砍伐和城市化导致的过量沉积物（沉积物）径流可能会导致诸如水质下降和栖息地破坏等问题。 在水生生态系统中，沉积物（沉积物）作为各种生物的栖息地。微小的生物如蠕虫、昆虫和微生物在沉积物（沉积物）中繁衍生息，在养分循环中发挥着重要作用。此外，像鱼这样的较大动物依赖于沉积物（沉积物）作为繁殖场所和食物来源。这些生态系统的健康与存在的沉积物（沉积物）的质量和数量密切相关。 人类活动对沉积物（沉积物）动态产生重大影响。建筑项目、采矿和农业实践可以增加沉积物（沉积物）径流，导致河流和湖泊的淤积。这可能会破坏水生栖息地并减少生物多样性。此外，增加的沉积物（沉积物）可能通过引入污染物和减少光透过率来影响水质，而光透过率对水生植物至关重要。 另一方面，沉积物（沉积物）也被用于各种人类活动。例如，在土木工程中，沉积物（沉积物）可以用于创建填埋场或恢复侵蚀区域。在某些地区，沉积物（沉积物）被用作建筑材料，如沙子和砾石。这些做法突显了沉积物（沉积物）的双重性质，即它既可以是资源，也可以是挑战。 此外，对沉积物（沉积物）的研究对于理解地质历史至关重要。沉积物（沉积物）层可以揭示关于过去气候、自然灾害和景观演变的信息。地质学家分析来自海底或湖床的沉积物（沉积物）核心，以重建历史数据，为我们提供关于地球如何在千年间变化的宝贵见解。 总之，沉积物（沉积物）不仅仅是水体底部的泥土；它是我们环境的基本组成部分，影响生态健康、人类活动和地质过程。通过理解沉积物（沉积物）的重要性，我们可以更好地欣赏生态系统的微妙平衡以及保护自然资源的可持续实践的必要性。